To recap, Riri asked whether the extension for the BASIS would fit the Kapex...
ririmarqueverte said:
On Forrest's sketches it looks like the extensions of the basis could fit with a T nut ( if it wasn't for a question of height which can be easily fixed ). Like i said i have been using these extensions on the basis for a number of years and i have to say they are billiant: rigid, stiff and yet light. The tape measurer is great. Can someone tell me ( please

) they will fit onto the Kapex!
I posted an exploded diagram of the BASIS extension (Basis KA 100/200) and the Kapex extension (KA-KS 120), and they looked remarkably similar. Riri agreed, and said he's ask Festool...
ririmarqueverte said:
I have to agree that the two extensions are indeed very similar and i can't see why they could not be interchanged ( apart from height ). Thank God there is thus some hope for me ;D!!! I'll take the matter up with my reseller ans i will keep you posted.
Unfortunately, it appears that Festool are being rather quiet on the matter...
ririmarqueverte said:
Still no news from Festool regarding my Basis extensions ???. Seems like a long time for them to determine whether these extensions do fit on the Kapex or not! Monday i should give them a wake up call! As far as i am concerned i am more and more convinced that it will fit. The design is exactly the same and these aluminium profiles are pretty standard in their construction.
Thanks for the update, Riri.
Tonight I decided to look for a parts diagram for each, in the hope of finding out how many parts were common between the two kits. If all the parts in the Kapex extension were the same as all the parts in the BASIS extension (same part no, same quantity), then then the two kits would be considered identical, and Riri could happily use his existing BASIS extension with the Kapex. Although they look the same in the exploded diagrams I posted, the length of the legs has always been a question mark. The Kapex extension should come with legs to make it level with the cutting table of the Kapex (presumably mounted on top of the MFT), whilst the BASIS extension should come with legs to make it level with the work surface of the BASIS. Since I believe that the working surfaces of the BASIS and the MFT are the same height above the ground, the legs for the Kapex extension would need to be longer by the height of the cutting table of the Kapex (which has been designed to be the same height as a Systainer).
OK, enough of the recapping - what did I find...?
I tracked down the illustrated spare parts diagrams for the BASIS and Kapex extensions at www.festool.co.uk and have shown them below. You will see that the diagrams and details of the parts are indeed very similar, but there are a few differences which I have highlighted in yellow:
BASIS Extension:
Kapex Extension:
You will see the following differences:
The order number of the tape measure has changed
The legs have different order numbers
The Kapex has a Stop Angle assembly, which the BASIS doesn't have (Part 31)
The Kapex has an extra "featherkey" (aka T-nut) and extra "DREHKNOPF D.34" (aka thumbscrew)
And that's it! The two extensions seem to be identical, apart from above differences, and we have the answer to the question about the legs. The Kapex extension *does* have different legs (if you measure them in the diagram, they are longer than those of the BASIS).
In summary, I see no real reason why Riri's extension for his BASIS can't be used with the Kapex, so long as he gets round the difference in leg length. He could order some additional parts from Festool (new legs, additional thumbscrew and t-nut, Stop Angle assembly), but I think I'd be tempted to improvise in order to save money.
Forrest