Good Morning I recently-ish bought a second (broken) Robo 3D R1+ from ebay and fixed all the issues up to this point (Thanks largely to this forum and youtube), but I'm noticing underextrusion. Here's what I've done so far: •Tightened various pieces on hotend, as they were a little loose (Had oozing from above heater block) •Double checked the printer head isn't too close to bed. •Fiddled with temperatures in case the thermistors read differently than my first Robo. •Cold Pulled/Atomic Pulled several times with Nylon (Nothing came out.) •Replaced Nozzle. •Measured 100mm and extruded, found under-extrusion there and adjusted. •Measured the voltage on the Stepper Driver: This was kind of weird because my numbers were janky compared to expected (Was at .058v, Y axis was at .072 so matched that... but if I adjust higher than .075 it drops back to 0v? The thread I saw seemed to think it should be able to go to double that. Maybe I wired the breadboard funky?) - Extruder Motor used to run without heating up at all, now the extruder Motor gets to about the same temperature as my original R1+. •RE-measured the 100mm of filament and adjusted, to correct for the new extrusion voltage. •Changed to printing on the same computer as the original RoboR1+ as the laptop lagged during a print. These SHOULD be chronological from left to right. I might have mixed up the first two, but I'm fairly confident on the last 3. The middle one I believe was an issue with the computer lagging, as that went away when I switched off the laptop I was using with no changes to settings or printer. Unsure which of these prints this was, but figured it'd help. Occasionally top layer doesn't completely overlap with the perimeters, or will have gaps within the topfill itself. (Using elephant phone holders as my test print as even if they under-extrude they're still useful and can be gifted to friends/family/coworkers so I don't feel like I'm wasting plastic) Same plastic and print on my Original R1+ just to make sure the plastic hadn't gotten funky from age. (3D Solutech Red PLA) My current plans: ◘Print a different oiler, as the one I'm using on this robo is completely different compared to my original and I want to rule out the oilers performance as a variable. ◘Swap the Extruder Driver with the Y axis and see if it improves anything. Running low on ideas at this point. I never see the extruder physically stop, but maybe I'm just not watching it long enough. I'm still a little weirded out by my voltage findings, do the latest drivers just run lower or did I screw something up in my testing? I'm not a very electrically knowledgeable person so I certainly wouldn't rule it out. Any ideas/suggestions appreciated Thank you for your time!