Hello everyone been a few years since I have posted. I have been doing a lot of reading and I believe I may be in need of a new Mainboard. About a month ago I started having issues with severe under extrusion on my R2. I went from 146.5 steps to get 100mm to 346 steps. Recently I had to move it up to 502 steps. I have swapped the stepper motor out so I know it is good. I thought I was simply going to swap out the driver until I took a good look and saw they are integrated. So thoughts from the group, before I try and get a replacement board? 146.5 to 502.... sounds like a bad stepper driver to me. Also I did the below, I have ensured the alignment is correct for the filament path, I have swapped out the hex over to a new Prometheus V2, seasons and all. So I am certain there is no blockage. Extruding in the air it will do the 100MM but once the skirt is done (good first layer) it starts to under extrude. I did notice the retractions are fast and long compared to the actual extrusion.