Here's the story: Hill marine had a bunch of stainless steel gimbal rings built,they were selling them for about 600$. They were all fukked up with various fitment issues,crappy bushings etc. I personally bought one and it needed so much modification to just fit and work that I resold it with full disclosure of it's flaws. The guys at MaxMachine works got ahold of some of them and re-machined everything as neccesary to where it's supposed to actually fit without modification,of course they upcharge for this. If I was redoing my gimbal again I would probably buy one as stainless would be very strong and this particular one still lets you use trim switches wheras the merc racing hd version will only work with trim indicator cables,Smitty