The best hash will usually come from the 73 bag (or possibly 90 if you use one) because that's the bag that catches the majority of whole, mature, trichome heads
The 25 bag mainly catches smaller, immature or broken heads, along with other contaminants.
Reclaim makes great edibles. Recently i've been making gummies with mine and they are amazing.
I've also made a batch of tincture from claim which is super effective.
Out of interest, what is the unavoidable toxic chemical that means BHO is going to kill me?
I want to research it to find out if it's already too late for me.
Have you considered using a thremos for your soak? You can put it in the freezer to chill beforehand (butane too), and it is well insulated so the butane will stay liquid for longer.