Does anyone have a 'cheatsheet' for the skywater 130 magic layout rules that is in terms of "lamda" or # of grids where grid=0.05um ?

Magic rules (at least for sky130) are in nanometers, not lambda. Lambda units for sky130 are 10nm. If the underlying database is scaled to lambda, then the rules are automatically adjusted to the nearest lambda value. Normally, for sky130, one starts magic with the

sky130A.magicrc

startup script, and the underlying database is automatically scaled to the sky130 minimum manufacturing grid of 5nm.