Prusa I3 Steel 2.01 addon parts

I made some parts to my new build of a Prusa I3 Steel 2.01.

Most of the parts i´m using is this http://www.thingiverse.com/thing:1054909.
But i want to use 8 mm leadscrews instead of M5 threaded rods for Z.
I drilled a 9 mm hole in the X-idlers to let the leadscrew thru.
Then i´m using my part Leadscrew_Antiwobble_Left and right to Z.
At the top I bult a new top part thats center the leadscrew with a bearing.

I also made som belt pullys to use normal 624 bearings to Y and X. The norm