I also adjusted and was using it around 240, but it seems like the PLA filament is being supplied excessively. When I printed a 10x10x10 cube and measured it, each side was around 10.2-10.3mm. When I reverted back to the initial value of 212.21, it’s almost exactly 10mm. How about the dimensional accuracy for everyone else after adjustment?
I suppose the E-step should not really be used to achieve dimensional accuracy.
Basically, if the head is told to extrude a certain length then it should be accurate in just that simple task; 100mm=100mm.
After that, other calibration stages are necessary to achieve dimensional accuracy, such as : https://teachingtechyt.github.io/calibration.html#xyzsteps
I just checked my E-Step after doing it a few months ago but realised then that I did it with a heated nozzle attached. This time I removed the nozzle so it was just a calibration of the extruder gear movement without being impeded by the back-pressure of the filament being pushed through. I then updated the E-step from 224.03 to 222.92,yes that’s the difference having the nozzle off makes.
Incidentally, I couldn’t understand why G1 E100 F50 wasn’t working this time…until I realised I hadn’t entered G91 first for relative movement. 
I just checked my dual extruder and the left head was running about 12 mm more material than the right. I am currently having issues with the right under extruding on dual color prints. I am not sure what value to correct specific to the right head when checking the M92 values.
Any help would be appreciated.
I did not figure out this yet but I am wondering why you get 12mm less filament…
Is it more slippy or is there more counterforce to unroll the spool?
In the end, as workaround, I would suggest to adjust the flow in your slicer by this 12mm difference: 100mm/88mm=1.136363
So set your flow to 113.63%.
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I used two different colors of the same brand of silk PLA and they are the same size rolls.
I previously printed silk Pla and figured out that it has to be printed way more hot like normal pla, I got clogs too.
Mine was old so it went to the trash bin.
Whats your print temperature? Mine was 220°C…