They have mesurements on most hulls,like my Hustler they were giving mesurements from Hustler,then they make a cad to build the trailer.

Rick - Once I provided Myco with the serial number of my hull they knew the exact dimensions of my Fountain's hull and emailed me a detailed drawing of what my cradle was going to look like. Myco has been building trailers for Fountains for years. To get to this level of design detail for their cradles and trailers the Fountain factory must have shared a lot of data with Myco. Myco is even aware of what changes were made to the Fountain hull's from serial number to serial number (within the same model).

I think the bunks on my Myco cradles are wood covered in carpet.

SR-71

I agree that you should support the bottom the same way it is supported on the trailer, and that is what I would do if this was my boat.

But, one thing I have not heard here yet is what does Donzi say. The first thing I would do is ask the manufacture of the boat how it should be supported. I'm pretty sure they will say same as trailer. I also would think they would happy to give you the measurements needed to make a proper lift support.