I've made so far:
-a hot end fan with a switchable cooling duct (can be turned on and off for abs/pla).
-modified x and y motor brackets to keep the motors off the frame to reduce resonance and noise
-a strengthened hot end mount
Ive added one part to [www.thingiverse.com]
its a small lug which slots into the frame rail to support the right y smooth rod, without this lug the motor tilts under the belt tension. Oddly smartfriendz have placed a lug on the left side, but there was none on the right.