New Ratrig 400 with the “standard” configuration of Bondtech BMG and E3D V6 on an EVA mount. This leaves a small gap between the extruded and hider sink, and specifies a 62mm ptfe tube between them. I’m using the blue Capricorn PTFE tubing. I can’t get it to extrude properly without jamming. I’ve made sure the hotend fan is on continuously at 100%. I’ve tried four different spools of PLA from different manufacturers and in different colors. I’ve tried two rolls of PETG with even less success. Measuring filament movement into the extruder suggests that the steps are properly calibrated (i.e. 50mm gives me 50mm of movement consistently). I’ve tried temps from 195 to 255 degrees with PLA, and 220 to 255 with PETG retraction settings I’ve tried between 0 and 2mm with speeds between 20 and 40mm/s I’ve lost count of the clogs, several dozen at least. I’ve had to make replacement PTFE tubes, and varied the lengths up and down by several mm in approx 0.5mm increments I’ve tried cleaning the nozzles with a torch, and at least six brand new nozzles. I’ve tried oiling the PLA. This is my third printer, but has had 10 times the trouble of the others. Zero successful prints. I’ve gotten a couple of calibration cubes to finish, but they are severely under extruded and look “moth eaten “ as if they’d been out in the weather for months any suggestions before I just start over with different hardware?