I could see where that would make bringing up the two long sides and gluing glued to the bottom jig without help and then gluing a a center cross brace to hold them in place for the end panels, again without help. I say this because its the way I had to rebuild my 1/2" thick 244 tank. If is wasn't for the center brace keeping the two large sides in place, I don't know how I could have brought all 5 panels together at once.
I cured one end at a time first using the center brace to support the sides, then flipped it up[ side down to do the bottom. Worked great for one person mostly but obviously too time consuming, your bottom really makes it much easier and faster.