When printing with ultra-flexible materials on the H-Series Machine, there are a few modification that can be done to improve the quality of the print.

Due to the nature of the ultra-flexible material, the filament will not feed through the feed tubes and so must be directly fed into the extruder.  This can be done by feeding the filament straight down from the right side of the H-Series machine.

A quick and easy setup is to use a clamp to hold the reel on the right side of the electrical control box in order to allow the filament to feed directly down into the turret.

Remove the PTFE tubing that leads to the filament cabinet replace it with a small length to ensure that the filament has a direct path to the filament drive,

Make sure to keep an eye on the print while printing and sporadically reduce tension on the line to ensure that the filament is not stretching too much or the print will end up being under extruded.