John....congratulations....that is a massively large brass constructed stern ramp....I see you have also used square sectioned support material
The stern support structure for the ramp is also a model in itself
I suspect we could all learn a few tricks from you
in heat sinks whilst soft soldering
Sometimes it is a necessary disappointment to paint brass work
The weight of the ramp itself will not need any form of weighting ballast......will you have spring loaded cylinders as pushouts to take the ramp over centre?
I look forward to your build progress..........Merry Christmas.......... Derek