Why Your BLTouch Sucks...
I've recently got into 3D Printing and immediately out of the gate, I bought a CRTouch (Creality's version of the BLTouch) for my Creality Ender 3 v2. I have a lot of experience with tuning my woodworking tools, and tramming (aka bed leveling) the bed was pretty solid after I was done. My biggest complaint would just be that the plate glass that was shipped for the printer is far from flat, which just implies a poor quality in my book, so I was glad I bought the CRTouch to "fix its flatness" in software. However, I didn't see any improvement when I did calibration tests afterwards. It wasn't until I started reading the Marlin GCode manual did I start to find some information I didn't expect, which led me down a YouTube trail and ended with...I needed to update my printer configuration in Cura. I have since added
M420 S1 Z0(Marlin FW specific by the way) as a line immediately following
G28, and I couldn't be happier with the results. It amazes me that neither Creality documentation nor YouTube tutorials for installing the BLTouch that I watched ever mentioned this, so if you find your prints are just a bit off and/or you are having bed adhesion issues on the glass, maybe you aren't actually getting benefit of your bed leveling probe.