Brief discussion of my settings here
, and a discussion of somebody else's install here
. While the steps/mm depend on commercially machined parts that are more accurate than most of us can measure, and your values should be the same as mine assuming 200 step/rev motors and 16x microsteppings. Speed and acceleration depend on differences in printer design (your simple is lots different than my tweaked plywood plus), the quality and amount of wear on your bearings, and on the stepper motors installed, their current settings, etc. Yours will be different than mine.
The steps/mm setting is (200 steps/rev * 16 microsteps/step) / (8mm/rev) or 3200/8. A big change from the original allthread's 2000+ (2260 irrc, notebook not handy)