Yes Mark B built your first version SST middle rubber assembly ,another built second version look like copy" SG" front nose hull , another built third version my SST last one so I heard that he built new 4 version improve with carbon tub this year
He will help you about SST Twin and You have fun race Good Luck!
I am not sure what version of twin that is. But it looks like one of a pair that I built for a friend in the land down under. For information I build about 4 to 6 twins a year of the same boat. And if you look at how many years I have ran twins that is a lot of boats. From year to year they have small changes in them. Some boats are good boats and some boats are outstanding boats. And what I have found is some of the things that make a boat outstanding may not work on a boat that has different changes on it. But I have got a handle on the do's and don'ts and all of my latest boats are very good boats. Am putting the final touches on 4 twins now.
For the answer of the boat in question. It is a very good boat with 80's or small 90's. This is what I ran in those style of boats. K 82's and K 90's to be exact. Would not put RS 90/101's in it.