Bed Levelling ... am I missing something or just being obsessive?  

RE: Bed Levelling ... am I missing something or just being obsessive?

For some reason my initial post vanished...So for anyone wondering why there's a blank window, here's basically what I wrote. 😱 

I just put together my mk2.5S upgrade and did a extruder step cal and then turned my attention to z-height and bed cal. I think I did the initial dial in on Z-height and was going to start with the multi-square setup but at the same time I was setting up a clean octopi server and installed one of the bed levelling mesh plugins (see below).

I see posts about nylocks for the mk3 but not seeing anything that shows step by step what to do for a mk2.5s - I saw some posts about spring washers and stuff but I'm not sure if I even need to do that... some people say you should only have 0.02 variance?

I can cut some washers at work out of 0.1 material and shim up the centre until everything is on the -ve side and then shim up the 4 corners of the bed? Or should I just use a calibration square stl and dial in the bed level adjustments for L/R/F/B??