We also have the makita ls1013, and the side extensions were bent upward too, but I thought we did it ourselves by using them as carry-handles. The ls1013 doesn't stand up to transport abuse as well as the 1214, I think it's because of the longer handle for the miterlock, which stands out much further than the knob-style handle, and when it's been bent the loctite that holds the threaded rod to operate the miter- and slide-lock will loosen, thus losing it's function.
I have the Kapex for a month now, and to compare the smoothness of the slide-action: It seems the makita slides smoother, but that is probably because when you let it go, it will slide back by itself; if you let go of the kapex, it will remain where it is. It also seems that the bearings make more noise when sliding, but that's just because they're closer to your ears.
In Holland the ls1013 came with the higher fence, a hold-down clamp and the extension rods as standard, even a metal folding table (back in 2001, so without the worklight and without the laser); but it almost costed the same as the kapex does now (the basic version).
The trenching feature of the ls1013 is pretty useless, because it's way too "bouncy" (there is a lot of play on the hinge for the wing-nut, and it's really close to the pivot point of the saw, so a little adjustment means a lot of extra cutting depth), and the hold-down clamp is more hassle than usefull. The hold-down clamp on the Kapex on the other hand is a joy the use, (works similar too the mft clamping elements) and is very easily swapped from left to right (just turn it towards the back and pull up).
I used the extension arms with the flip-stops for a small series of picture frame-like trim (replacing single pane glazing with insulated glazing in 8 tumble windows and a few doors), they worked great, but I was a bit annoyed because I had to move the work support bracket to the other side of the legs, to support the stock when it was still long (in the demonstration pics they appear to move the legs outward, but that seems even more annoying). So I got an extra set of support brackets, this way I can leave the legs at the end of the First (fixed) part of the rail, and have the extra brackets on the short part of rail that can slide when the rail is extended, and still have support when the stock gets shorter.
Another thing is that the kapex doesn't come with a dustbag, the first time I used the saw was for cutting fascia boards outside, and I didn't want to haul the vacuum with me, so the wind blew the sawdust in my face. I thought the dustbag meant for the ehl 650 planer would fit the kapex, but it doesn't (the outside diameter of the dustport is slightly larger, and it won't fit.) I went back to the shop to find out if the one meant for the 850 planer would, but they advised strongly against using a dustbag with the kapex.
Frank-Jan