I installed Lawsy's Mk5 and got the same issues LdyMox and 2n2whatever had - (Standard SD3 extruder not lining up quite right with feed wheels and filament kinking between feed wheels and extruder. So, it looks lke 2N2whatever (sorry) made a mod that takes care of the alignment issue, I'm hoping he added a short section of guide between the wheels and extruder to prevent that problem like his PTFE tubing did.
Also, Lawsy, my tensioner arm is giving me trouble. Seems the little bolt head wants to pull through the ears in the assy and escape. No, its really not tightened up that much at all, it just looks like the material (I used ABS) is kinda thin right there where the bolt capture is. But I can see how it could be beefed up a bit, no sweat. Perhaps the cavity that the bolt head settles into could be a little bit cut out toward the tensioner arm, like a detent, so the head would not come out of its hole without some linear relaxation of the tensioner sufficient to let the bolt head come up, then out, of its detent. Seems it wants to slip right out of the assembly when you swing the bolt up to release the tensioner arm, I'd rather it stayed in the assy. Would it help to replace the socket head screw with a hex head (wider head)?
The tensioner arm itself wants to let the tensioner bolt and spring assy slide off the end of the tensioner arm. I've seen tensioners in other applications that have little ears kicking up at the very end of the fork to discourage such casual dislocations.
I'd be happy to draw it out with your SKP if you like, unless someone prefers another approach.
I really like the work you guys do, very cool stuff, indeed. I learn a lot just looking at your work
Robox printer, HICTOP (Prusa i3 variant) Model 3DP17 printer, ELEK 2.5W laser engraver, AutoDesk 123D Design, Windows 10