How do you clear the eeprom, isn't it M502?
Yes, G1 Y-35 move the nozzle tip between the X and Y tower, but to where the probe tip was exactly.
I did something similar to what you did with the G92 and G30 ish before I moved onto G33 P1, and the results were pretty much the same. -2.4 is a good one.
I think the most important part right now is to definitely try to clear the eeprom, I thought M502 is to clear it but maybe not?