Orca Series linear bearing lm8uu x-carriage - Selectable Timing Belt

I have not finished designing my own X carriage yet but need to get my Orca finished for now.
http://www.thingiverse.com/thing:19837

However if you prefer this version I will leave it here.


Raggies X carriage looked about the best of the ones on thingyverse, the only problem is I wanted to use T2.5 timing belts and the original seems to be for T5 only.

SO using the orgiional STL I have made an open SCAD script so that you can choose what sort of timing belt you want to use (so long