Upgraded Flexible PEI Heated Bed For Ender 3(Pro)/Ender 5(Pro)/Ender 3 V2/Ender 3 S1(Pro)

Much easier to use so far, no glue required.

I have just started with 3D printing. I have an Ender 3 Pro, and I very quickly destroyed the supplied rubber-like mat. Then I bought a glass heated, and finally a PEI flexible steel bed.
Initially I had no success, largely because I was learning and made mistakes with bed levelling and bottle closeness to the bed.
I turned all this around when I upgraded my motherboard to a 4.2.7 and installed a CR Touch. I also had to learn about temperatures and skirts, brims and rafts. Only today has the penny dropped. With the PEI, i'm using 60º for the bed and manufacturers recommended temps for filament. For the objects I printed today I.m using a three-loop skirt, no brim or raft, nor other support material. This will change as I get better.
I used to get grinding from the extruder and broken filament from time to time, so I removed the collet and now the spring works perfectly - no grinding or clunking.
There’s one thing I’d like to raise. My firmware is Marlin V1.1.2, 2020-04-25. Because I have a CR Touch it’s essential to get the Z offset right, but my version of the software seems to be incomplete.
Under Prepare I Auto Home the printhead, and move the Z axis to a point on a postit note that’s just not dragging. This could be a setting like -.550 but when I go to the only option to set the Z offset, under Control->Bed Levelling->Probe Z offset, the setting is -0.600. I can only work with increments of 0.100. I have no access to controls that allow me to enter -0.550.
When I watch Youtube videos the tubers all seem to be able to change the Z axis to the minute detail of the result of moving the Z axis at the start of the process. So, when I’m in the Probe Z offset screen I use the postit note again to find the best position. What I do seems to work but why can I not enter exact Z offset details I recorded earlier.
I do hope you can look into this for me
Regards

This Upgraded Flexible PEI solved all my adhesion problems, hopefully this will end up being the standard print bed that comes with the printer.

Great to work with. Easy to clean. Jobs are easily released when finished. Glad i upgraded

My original glass bed had delaminated and this PEI plate was my first choice. Good adhesion and releases model easily.
Very happy.