![:bugeye:](https://madmodder.net/Smileys/default/confused0068.gif)
You've been busy!
Do the different types of wheel/rail interactions make more sense now? You can imagine what happens if the two back Z rails move toward or away from the front ones; a few mm either way doesn't affect the operation at all!
I essentially treated my Cobblebot kit as a box of parts to build from, some of which kind of sucked. The Arduino was a junky clone and the wheels were terrible.
Yeah, that stuff adds up quickly!
Oh, I should mention: I have a new design for the Z plates that has a much longer arm along the Y rails to reduce the sag. If you re-style it to 20x40 the deflection will drop by 57% anyway. Probably still worth having the new plate design.
I agree, Sketchup has some really cool stuff and some really terrible stuff. Its all about the visual! Tricky to get it to produce good STL files, but that's what I work in... I actually worked with some folks who designed a complete cement plant in Sketchup! OMG a big model!
Can I get that SKP model to add to the Thingiverse file?