wondering if anyone has successfully added a tunnel hull to a regular traditional flat bottom. I poked around for info and talked to one custom hull repair shop that installed one.they said that they would never do another one. they would not tell me any more info other than that if i could get my hands on a factory original tunnel that they would install that. im woundering were the problem comes in. and if this addition improperly installed could crack the floor??? also how difficult would it be to build this piece, any reinforcement of surrounding area, i realize that you would need new drain holes on either side, and that the placement of this piece would have to perfectly allign in between the folds in the aluminum.