I think you mean HMS Mohawk, which was slightly different from Amazon.
Most of the class differed in some way being built in 7 different yards to a very basic spec.
I can only assume that your mate has a Deans Marine kit.
In which case I suggest he contacts Deans for a copy of the plan and instruction book.
Pic shows Dean's Amazon.
BTW: The original had 3 shafts, Deans kit is designed for only one.
Cheers, Doug 😎