No problem. I wouldn’t even think about max dry weight on the trays itself, only what percentage output the material i’m washing will give me after the fact. If you stuff the trays with the intent of getting absolutely the most product dried at once you’ll get large frozen chunks. Once you hit the limit of how much liquid it can take out of your material that frozen material will now stay in your hash patties.
Washing hash isn’t like BHO/distillation/solvent based extraction as you’re sort of doing a dance with the material and recognizing what it’s doing and working it on the fly vs. focusing on numbers and exact parameters. It’s very hard to give you correct figures because hands on experience has so so so much to do with it, an inexperienced operator could create a lot of waste during the washing/drying process even down to how you set your material on the tray itself so you can get the most efficient drying cycle possible because it is within the realm of reality that you have underneath the max amount of liquid in your hash patties but they’re arranged in a way where frozen bits still remain.
Rosin is a pain in the ass and is extremely hard to work numbers for unless you’ve got the process down pat to the point where you’re doing it in your sleep because different levels of experience are going to have different levels of waste while washing the same material. Also…if you haven’t purchased the pharma, just go for the home version provided that it’s got the same amount/size trays (i dunno what HR is making these days). You’ll save a thousand or more and can just simply upload the firmware from other harvest right models to get the same functionality you would get out of the pharma.
If you check out the Rosin Press Go Brrrr thread it shows a lot of examples of this and can get an idea of what i’m talking about