I know that it is probably pointless discussing this now, given that you have already built the winch housing, but I will anyway...
Correct me if I am wrong here, but from what I can see, the winch housing is mounted on removable legs and you have mounted the winch internally on the back face of the 10" x 10" RHS.
Is there a technical reason you did not simply attach a solid base plate to the removable legs and mount the winch horizontally, not vertically? As far as I know, all winches can be configured to mount either horizontally or vertically, you just reposition one of the drum separation stays for a clear rope path.
If you did this then the surrounds for the winch could have been made from something as light as 16 gauge sheet, which would have significantly reduced the weight. Alternately, you could have gone with no winch surround at all, if a lighter weight was a criteria.
Just wondering, as you could have saved a significant amount of weight if you did it that way.
I should add that anyone who knows me would probably be calling me a hypocrite at this point in time, as I normally over engineer everything and build stuff much heavier than it needs to be.
And here I was thinking that this was just me!
