Partial Answer My X and Y steps/mm need to be 160 not 80?

After upgrading to 8mm leadscrews and re-compiling, thinking I had only changed the Z axis steps/mm, I ran into an issue from long past.

Basically looking into a bed leveling question, I found X and Y were moving half the distance they should be been.

For some reason, my R1 (somethiing) needs to have steps per mm set to 160 rather than 80. For one reason or another, maybe senility, maybe forgotten experiments (Same thing?) I compiled it using 80 which was the un-commented line. in configuration.h.

That resolved now, I wonder why this unit is like that. I guess the steppers could be oddballs? The Marlin Version appears to be 1.0 FWIW.