Also be aware that some hulls require support in different ways e.g. some boats require keel band support other don't and can sit on swinging roller cradles.
I know that getting it right makes sooooo much difference to the boat experience, my last boat had a bad trailer until I spent much time and not much money getting it just right. My current trailer was a perfect match to the boat when purchased, mmmm!
Best of luck.
Rob