Re: 1985 v-sonic 190br
I own a 1985 Mark Twain 190br, with the V-Sonic hull. I also assume this is the boat you bought. A fairly heavy. well made boat i'd say. I replaced the floor and did some interior work and now I live mine.
Good call on he ebay listing. it's item # 230133751178 on ebay. May be just like the boat you bought! Same as mine except I have the B-2-B seats rather than the captains chair and bench. Same color as mine also. I have a 200hp V-8 Mercruiser.
Not sure what else you want to know. Few pictures around of these anymore, but I do have the original sales brochure for 1985 Mark Twain Boats, it's just a pain to get pictures from it to forums.
Enjoy your boat. Not too many Twains around so you'll have something a bit unique.