beautiful work!! i finally got around to messin with my 240 and to my surprise, i removed the bottom trim and was pleasntly surprised that there were 2 bottom panels, one inset and the original capped ( the cracked one). so it appears that the tank was already repaired. im goin to just go ahead and reseal everything and pray that there are no leaks!
Have you ever considered using blue painters tape and taping off the all the seams and then silicone it . Remove the tape and it's done ?? No trimming . I've done reseals that way and it eliminates the trimming.