to add my happennies worth. Not all ABS filaments are the same depending on their exact formulation some are easier to print than others. we work mainly with ABS and nylon and in both cases we found we could work with some brads of filament and others failed or were unreliable for us.We found the easiest ABS to print with was ABS-x filament made by Mitsubishi in Holland and sold as own brand premium filament by several retailers as ABS-x by 3dfilaprint and as ABSpro by Oosnest that I know of there is probably a retailer near you,Next in order of ease we found the ABS regular also made by Mitsubishi and sold by the same outlets.Several other brands we have tried have proved almost impossible to print reliably.Incidentally we always pint onto Tufnol (Garolite) sheet with a very thin coat of ABS milk,