Z80 processors?

ZXNet echo conference «real.speccy»

From Sergey Cherbynin To All 30 January 2003

Greetings, All!

I have a yellow scorpion with SMAK, so the other day I decided to check a couple of processors
for performance (I had Z80A and Z80B lying around in my stash), and I have
KR1858VM1 on the board, when installing these processors, the
screw is no longer detected (as if it was not there at all), but otherwise everything is fine.
Who knows what the reason is?

All the best, All!
With best wishes *** Sergey *** !