The 3.3 mm offset one might be a bit tight with no PTFE tube. I forget what offset i used when i did no PTFE i'll have to look tonight. I did some test prints yesterday and while its feeding good now. It seems I just can't get the layer settings right. looks like a screen door ( or think something with a high infill % ) when i print the layer lines don't touch each other and i'm not sure why. Outline overlap and the layer settings don't seem to help. Extrusion multiplier does fix it but i have to crank it WAY up. filament is set to the right diameter.