There are two versions:
-1 fan: fit perfectly, tested.
-2 fans: it need to move y endstop 10 mm to y max.
both designed to fit over original extruder enclosure.
My deal was to remove enclosure without unmount fang to manage extruder.
Update: printed and mounted 2 fans version ( black) tomorrow bridge test
06/11/18 Update: terminal fan duct inclined by 3 degrees (1mm down air flow target) added 150mm bridge test (black) for 2 fans version printed BEFORE this update
1 M2 x 15mm
M4 x 50mm for Fan