dual e3d v6 mount

i made this mount to fit dual e3d v6 clone hotend's on to my cheap ctc prusa i3 pro b with this X-carriage http://www.thingiverse.com/thing:1329854 by Sectorix. I had been using https://www.thingiverse.com/thing:617691 by Triggerr and loved it, so thought id try and remix. The cover has a hole for a 12mm inductive sensor (it's a tight squeeze but does fit), and 2 5mm LED lights, and a 40mm fan. I pointed the ducts up to reduce drafts onto the prints. This is still a work in progress, im currently testing it and so for the only issue is clearance on the the left front bed bolt, since i run a 3mm aluminum heat bed i just removed the bolt. i made this on tinkercad and im a NOOB to designing but i did my best. The 4 mount holes are for 4mm nuts (using 4mm i couldn't move it around) so once installed using 3mm bolts and nuts the mount can be leveled a bit so you shouldn't need a Z-offset. the X-offset i have is -29.4mm (my #1 is on the right). I still use the GT2560 clone board that came