Alright. So im a 14 year old self proclaimed wannabe engineer. I have recently set for myself to build a cnc machine, to make my projects easier. So i asked my dad if i could build one, and he said yes. AS LONG AS I HAVE ALL THE PLANS AND PART LISTS, AS WELL AS 3D MODELS. So this is where is started crying. No im kidding im not 13.. I then started trying to learn SketchUp, as i saw that this is where Openbuilds has its parts, and here comes my problem. When i take the parts from the warehouse, they dont snap into each other, and i cant allign them right. I also have to try a buttload of parts to find one that fits into the other about right, although i cant REALLY check this, as the nut wont go in the hole (pun intended). Am i missing some plugin or something? Or is it really just that hard?