I think it is finiky until you find the sweet spot, then you'll set and forget for a long while.
I feel like I remember the OEM spec being too big, at maybe something like 3mm play... But that wouldn't let it release fully when you held the lever against the grip. As such just a hair less was the right balance that let it release fully but also wouldn't slip.
Honestly I've left mine alone now for 15k or so...