I’ve been using the same grain focuser for decades; a Bestwell Microsight III. Lately I’m finding that I need more magnifying power, especially with small prints from 4x5 Tmax negatives. Yes I do adjust the eyepiece so the hair line is sharp. As a workaround I keep a TXP negative with plenty of contrast and details handy to get me in the focus ballpark. Are there any more powerful grain focusers out there?