Bubble can produce a great product. Best cuts I've ever taken were from clean dab rigs with bubble. Machine it for 5-10 min, do 2 or 3 batches, save the leftover plant material for butter, or an ethanol extract (if you have a distiller.) The grating and drying process is so important for the finest hash, especially if you will be dabing it. I use the 220 bag inside machine and in bucket. Then 120 70 and 32 bags; but the best really comes from separating out the 170, 120, 90, 70, 32 microns; is just very time consuming. I run my trim after drying and curing, and add enough ice to keep temps around 0 C using a thermometer. Use RO water so there is no interference with natural chemical composition of hash. Ice find the best quality you can, making ice from RO is the best but also extremely time consuming. Good luck