#1 Your Hacker can run backwards or forwards. Switching one wire will reverse direction. I put a small piece of heat shrink on mine after I have determined direction of rotation.
#2 The directions say to remove the c clip and absolutely do not make the center hole of the motor mount larger. So of course I made the hole larger, in fact I cut the drive shaft short so the prop adapter fit as close to the c clip as possible and had to make the MM hole evan larger!![X(] Please don't tell PA I did this OK? So far 80 or so flights no-problemo. Mine has the A30 12L, Perfect! Though I'd bet the A30 14m would be fine. The plane is over sized for wing surface so it floats forever.
#3 Screw through the motor mount into the housing with the wires ( I had to find 4 short 4or 5mm allen bolts and washers ). The can will be behind the motor mount and the shaft will stick forward. Check prop clearance to see if you need to shorten it.