I dont mean to pry ,but the plywood you used ,was it marine ply?also I didnt see that you put a fillet in the corners of your tank before you glassed it up.fiberglass wont stick to right angles,thats why you must put a fillet there.If you want a crash course in epoxy go to west system online,their product is really good( I work on alot of boats)drylock paint is crap,they dont even use it here in bermuda.reading this thread has been very interesting,you have given me alot of ideas,yesterday I went to the glass co here and scored a door thats tempered starfire glass.for my 290 that I would like to build.Im so stoked!thankyou for the insentive