You should be able to change print settings in your slicer! i.e. print speed, layer height, infill, no of shells… all the important basic stuff! I don’t think there are any slicers out there that do not allow mods to these settings…please correct me if I am wrong.
The one thing i am worried about, is everyone says the print takes about 45min, the two that i printed took 1 1/2 hours each, and still messed up. I am thinking speed is not my only issue.
Can you confirm that you have active cooling on your printer? Is there a fan, blowing onto the print, in the immediate area of the nozzle? I’ve never printed a successful Marvin without cooling. It’s just too small. Even if there’s not much plastic being extruded on each layer, the heat from the nozzle will probably be enough to warm up the print too much. Worth making sure your hot-end insulation is intact.
Multiple copies is the best way to get good quality on the keychain. Unless you have the settings which make the nozzle hover away from the print for a few seconds each layer. Try printing 3 or even 4 of them.
