Acetone cannot be used in place of NP solvent. It's soluable in water for one thing, so you can't separate it and it forms nasty compounds in the presence of lye which will stay behind in the final product. You should be getting around 200mg of goodies out of your 40g. That's plenty to clean, so see if more spice comes out of your solution with the extra lye first. If you still have your plant material, throw that in the mix too. Do three pulls with your NP of choice, heating the solution to just short of boiling before the last one. Combine the solvents and reduce them to 25% of their original volume and put these in a jar in the back of a very cold freezer, and I'll bet you will be very happy in the morning.