I've always used the 5 cut method for sleds but the use of feeler gauges isn't suitable for miter gauges until I stumbled across this video .... https://www.youtube.com/watch?v=sL3K_fPLHc4 and all its associated comments and opinions
I tried it and found this method quick, accurate and simple. Assuming your square is accurate this works brilliantly. So much so that I'll use this method for all future sleds and gauges. After this adjustment I thought I'd double check it using the 5 cut method and the final error was negligible.
Do people use this method?