Prusa i3 mini X-carriage for GT2 belts with 30mm spacing

I really like the parts published with Prusa i3 Improved for Laser Cut variant by twelvepro (http://www.thingiverse.com/thing:39889), and especially the design of Y-belt Clamp and X-carriage. The teeth grip on the belt very tight - much better than on original parts.
However I found out that mounting holes on X-carriage are 24mm apart but the new standard for Prusa i3 parts is 30mm (for example on Greg's Wade extruder for Prusa i3 by misan). So I modified the part to enlarge the spacing to 30