FT011 and FT012 Rudder Adapter for Aluminium Rudder

These are adapters to use cheap 75mm aluminium rudders from Banggood with FeiLun FT011 and FT012 speed boats.
Sure, others did it without any adapter but then the blade is to close to by the hull.
I made the measurements so that the placement of the rudder blades are at stock position, only that it is on the FT011 round about one half of an inch more to the right to get a smaller adapter.

Btw. here is the link to the rudder for less than 5 bucks atm.:
http://www.banggood.com/75mm-Metal-Suc