I am in need of a few word of advice i have a johnson 200 hp motor on this 90 model 20ft stratus the transit is bowed out about a 1/4 of a inch and the top part is 3/4 of the way rotten it gets better as it goes down to the bottom. The bottom half is still in tact though im sure its only a matter of time. How much time is my main worry i have tared and silicone the back side so that no water will penitrate the little gap inbetween the transit. Is this a major repair that could cost more than the boat itself? just looking for words of advice...