Recently (so not used extensively…) ordered CNC Spoilboard Surfacing Router Bit, 1/4" Shank 1-1/2" Cutting Diameter, Carbide Insert Slab Flattening Router Bits Planing Bit was recommended on this forum, using on my LR3, same router.
Found reco, was from Cutting board for thanksgiving - #4 by jallen
While digging around for the reco post, I stumbled onto bunch of interesting surfacing bit threads Search results for 'surfacing bit' - V1 Engineering Forum with ideas on ensuring setup is perpendicular.
Am using jamiek’s surfacing gcode generator script, see Spoilboard leveling with estlcam - #2 by azab2c
Cheers!