Do it,,I'm on a no 3" glass tape kick, I can't stand the stuff. What do you get with 3" tape? a big sponge of glass that's an effort to get flat while leaving adjacent areas of the bottom panel unreinforced. For wide bottom panels a well placed knock cracks the epoxy at the edge of the 9oz tape. Make the fillets small and smooth (if the goop was too dry you can go over it with a finger dipped in alcohol. When it's cured enough to not stick to the glass, you can glass the entire inside with 4oz with another 4oz on the bottom panel up about 1/2" above the chine fillet. Ok,,1 1/2" tape on the chines and one later of glass on the interior if laying another layer of cloth is too traumatic. Spreading glass over a larger area with two layers of 4oz on the chines seems to put the glass where it's more effective for very little extra weight.