Within the past week I have successfully printed Taulman Bridge Nylon with my UM2 for the first time. The success was enabled by the following measures: - Enclose the system with a box to produce an elevated temperature environment (mine gets up to about 105F after about 10 min of running) - Put a fresh coat of 10% Elmer's glue solution on the bed before each job (I can see where the parts being removed from the bed at the end of a job leave a clean spot on the glass without glue). - Mess around with temperature until you find a temperature low enough to cause no charred black spots to come out of the nozzle but high enough to get a good juicy melt. 230C nozzle and 80C for bed worked for me. - Keep the filament dry. Attribution: This design was remixed on Tinkercad from " spoolholder for smaller inner diameter" by Ed Driesen https://www.youmagine.com/designs/um2-spoolholder-for-smaller-inner-diameter