/diy/ - Do It Yourself

>>2736607
>ruled out the gcode
>ruled out the filament
>ruled out the z screw
>ruled out the bed surface
>ruled out the bed temperature
>ruled out the nozzle temperature
>still have the first few layers not bonding to the surface or each other properly
Am I supposed to exorcise the fuckin thing at this point? I guess I try taking apart and inspecting the print head next, solely because I've ruled out everything else? But what am I even looking for? It can't be a clog, it was like this from the start so it'd have to be some kind of pre-existing problem in there, but what would that look like?

Having a mild panic over a problem I can't seem to find anyone else ever having from googling it, I've printed a thing that's supposed to be 200mm tall, but it came out around 202mm and as a result fails to fit together with the other parts of the model and I have no idea what to do about it.
An issue with the motor should've caused it to be shorter not taller, an issue with layer-height rounding shouldn't've created an error this significant, and I printed it again with different supports and got the same problem. It's not a problem with the base-layer either, the extra ~2mm manifested somewhere in the middle, and I can't even begin to imagine what the cause here is.
As far as I can tell my other parts are the correct height (a 160mm tall part measures exactly correct, X/Y dimensions are perfect too) but if the problem is somehow past 160mm I wouldn't see it there, and this part is the correct height in blender and the correct height in cura, is there anything I'm missing that I can do to narrow this problem down?