Doing a walk thru transom

[Ctskip]

on a sailboat. It's 1983 31 ft sailboat with a propane locker located in under the transom seat. The cockpit floor is also the locker floor.Being a propane locker it has the sides and floor all finished already.I just need to do a split rear stay(easy part) and cut open the coaming/transom down to the cockpit floor. Glass in a few sections and viola! I know it sounds easy, but for some reason, I'm questioning the finer aspects of this job, like strenght . Any pros out there to tell me I'm crazy?
maybe even offer some encourgement. Thanks,
Keep it up,
Ctskip

PS I'd add a photo but its too big and wont let me download it to this post Thanks

[gonzo]

You would be cutting off one of the main structural parts of your boat. I suggest you get a knowledgeable person to do the job or at least design it .