I got mayself a 10 year old stepcraft 420 CKV router and im currently trying to bring it back to life. Im using a MKS DLC 32 with 8825 steper driver set to 1/16 Microstepping type. i had to set my steps/mm to 1600 to get my axes to move accordingly to the Open Builds Control. The software displays apearingly wrong messurements in the x/y/z directions now. if put to +10mm it displays 0,39mm. if necessary i can provide a whole breakdown of the machine with all its parts and settings. have been working on it for about 2 month now and did every step of calibrating and feed rate messuring at least 2 or 3 times now.
Make sure you have Report Inches set to 0/disabled in Grbl Settings. CONTROL handles imperial conversion internally