I am getting ready to purchase a 16' Lowe Roughneck jon boat with a 20" transom height. I am planning on putting a bow mounted trolling motor on the front. Right now I am trying to decide between the minn kota edge 40 and a motor guide trolling motor both are about the same price. Right now I am leaning towards the minn kota because I have read some bad things about the gator flex mount on the motor guide. I would appreciate it if you guys could give some advice or any first hand experience you may have with any of these motors before I make this investment. Oh yea how long of a shaft should I get? or does it matter that much. Thanks!