You are going to need more perlite, VOE here.
Over the years I found that it takes most, if not all, of a 4cf bag of perlite to properly aerate a fully expanded 3.8cf bale of peat moss. I also aerate @40% perlite. With the dry amendments, seed meals, composts and such that old 1/3 aeration ratio just doesn't cut it. Your mix will simply be too dense and poorly aerated.
Finding this out AFTER you've mixed up several hundred gallons, or worse, after a poor harvest due to inadequate aeration is really not something you want to learn from experience. Especially when it's so easily prevented at the git go.
Wet