Spent over $500 in store on 510 thread cartridges. Asked for their top product. Over priced, non-hitting solvenless hash carts that are basically worthless. They didn't want to help one bit! Better off next door at the Green dragon!!! Best store in Breck! They actually have Dablogic products that are much better! Don't waste your time with someone who doesn't care to make right by a wrong situation! Take Notice!