Swoody and Western Traveler - Thank you both for the input. One of the greatest things about this forum, in my opinion, is that so many people on here set their ego aside and listen to the experience and advice of those who know more than they do. I hope to uphold that standard.
Being a bit of a material science nut, I took some time today to see if I could find any lab testing of epoxy resin with short strand fiberglass as an additive. There wasn't much out there, however I did find two lab reports, which were quite interesting. They're linked below for anyone interested.
https://jmerd.net/Paper/Vol.43,No.2(2020)/247-256.pdfhttp://przyrbwn.icm.edu.pl/APP/PDF/132/app132z3-IIp014.pdfTo sum it up, neither of the two reports provided any evidence that short strand fiberglass added to epoxy resin increases the strength properties of the epoxy. In both reports, the epoxy material with the
least amount of short strand fiberglass additive was the strongest. Hopefully this helps anyone considering it in the future. Don't solely rely on what the product descriptions tell you.
All of that in mind, I spent the evening cutting some of my 4oz cloth into biaxial strips and will be taping the roof/wall joint. I got the hatch seams glassed tonight:
The tape is an attempt at the "painters tape trick", which I noticed has been mentioned by Steve Frederick on this forum as well as many boat builders on other forums. We'll see how well it worked when I go to peel it up in the morning.
So long as all turns out well with the hatch, I'll do the same with the rest of the cabin tomorrow. I had to fill all of my screw holes tonight before I could move on to the glassing.