Lee, first of all welcome.

This is a very common problem.  It's funny you should post this just now as I called TTS about 1 hour ago to arrange collection of mine for the exact same problem.  This will be the 3rd time it has been back to them.  I told them I was reluctant to give it to them again but they said if it is the same problem for the 3rd time they will give me a new jigsaw.  We will see.  It appears it is the early models that have this problem.  Phone TTS & they will tell you if it is still in warranty.
It is a well documented problem & don't let them tell you otherwise.

Rant over, this is a bit of a sore point with me 

Woodguy.

welcome . there is a reason why the seller sold it . unfortunitly your laboured with it.  the warrenty should stand. calle tts and find out what they will do to  fix it. if not sell it on.
maybe ship it to the us . they would love it

Lee, try to trim a slither off the edge of a sheet of 18mm ply or chipboard.  That's when mine is at its worst.  It's not too bad when the whole blade is in material but out on the edge it is unusable.

Cheers.

Is it totally faultless now ?  Mine had those parts replaced twice & it's still as bad as ever ?

I bought mine a couple weeks ago with cramps in my belly because of all the bad things you hear about it, but i must say it is the best jigsaw i have ever used.
Initially it is awkward because it is so light and slim and when cutting thick hard stock it required more pressure to be stable. But once you get over that it is great.
I sold my Bosch GST135 for it, it was good, but the base was crooked from new and it could simply not make square cuts. had allot of weight and guts though but totally ineffective DC.

the automatic cut mode of the carvex does seem to live a life on it's own, its' not very predictable so far. but it works.

Is there not a screw in the side of the plastic base to take op the slack ?

Hi all, am new to the FOG. I received my carvex PS400 yesterday and used it in anger today laying oak flooring. I had been looking forward to using it but I must say at the end of the day I'm, at the moment, unimpressed. I own a few festool tools and absolutely love them but this carvex might be the first festool I try and send back.
The carvex was to replace my DeWalt XRP jigsaw. Admittedly I've gone for the different grip with the carvex over the DeWalt and am finding it a bit awkward to reach the on/off switch.  What does surprise me though is I'm finding the dust collection is worse (connected to CT midi) than the DeWalt. I appreciate your never going to get good dust collection with a jigsaw but I just assumed the festool wood be better in that respect. I have found the blade can wonder around on scribe cuts too, but that might be me getting used to the saw.
It's such a shame because the jigsaw feels (as all festools) so well engineered and I really want to love it, but after 1days use Im feeling it's not worth twice the price of my old jigsaw, and I have to buy an angle base separately...

Mine was back at least 3 times & never fixed.  Complain to TTS, you will get a free upgrade to the 420.  That's what I got.  Much better.

Welcome by the way.

Good to have another "Jock" as some here would say 

Quick update on this. its still not resolved festool uk are hopeless and my local rep doesnt seem to be much better will try sending it to them for a third tiime and hopefully a miracle will happen and they might actually solve the issue with the machine.

I have already told them that. They have told me that Germany will just pass it onto them to deal with it. Will contact Germany myself I think and see what they say

I have to say I do not understand why tts UK have not replaced your jigsaw virtually everyone is aware that the 400 is not fit for purpose

and all they are doing is alienating customers with their tardiness

SHAME ON THEM..

I WOULD GUESS THAT THERE IS SOME TRUTH IN THAT STATEMENT, PEOPLE WILL WANT THE 420 AS THE 400 IS OF NO USE AS A JIGSAW WHAT DO THEY EXPECT?

Festool employees told me a couple weeks ago there was no problem with the 400 itself, the problem was that the saw was so complex to use that you would have needed to train users. That it could work perfectly but only with the right blade.
Now i understand why when i bought mine it came with a box of all different blades, i can say i tried them all when i had a problem and it didn't solve it.
I mailed them once about it, and they told me to go and exchange it at my local dealer for an 420 6 months after purchase!

I lol'ed when i re read my comment about the 400 being the best i ever used, jigsaws are versatile tools and in a few weeks of use you can't encounter every situation with it.
After months of use you encounter many situations and thats' where the problems show up.

The rep has not got back in contact nor has he returned any of my calls. I have left him several voicemail messages asking him to contact me to arrange a meeting so that he can visit me on site and have a look at how my jigsaw cuts as he and Festool uk promised. I'm happy with all my Festool products except my carvex and i only use Festool blades in my ts55 and my carvex yet no matter what blade the carvex has it will not cut plumb.

Been on to TTS again today was told that my local rep has been on holiday the past 2 weeks and now he has joined the tour currently going round the UK. so i will have to wait until he is free to visit me. i have been told they will call him and try and get him to call me today or tomorrow. Really getting fed up with TTS now its clear they don't really care about customers in the UK . They are probably sitting reading this now anyways