Easy way freeze crush and dust buds. Messy disgusting way to do many lbs is to spray. Hlvp paint sprayer with large tip compressor and heat gun. I never done this with solvents other than a bit of terps but Id probably use butane if I was going to use a solvent. Get everything good and hot hold the paint sprayer in one hand heat gun in the other pointed directly at sprayer. Micro particles of disti are going to go everywhere so wear a mask and do this outside or in a wide open structure.