I'll be interested in any replies too.
I have a set of wheels to fit. I believe you are supposed to use marine grade Sikaflex to seal the bolts and I presume the bolts should be marine grade stainless steel also.
On mine the id plate is in the way and I don't really like the idea of moving it 'cause that was always a no no in the car trade where I used to work if you ever wanted to sell it. I'm nervous about drilling anything on my boat...
There are some youtube videos about fitting the wheels but they don't seem go in for luxuries like measuring!