Bill Tindall, E.Tn.
To see if I understood ...
80 grit enabled 1/4 turn passes. This result is what I have found to be possible with 80 grit
36 grit enabled 1/2 turn passes.
Conclusion.....if you want to remove wood 36 is the fastest way.
Great experiment. Thanks...!
With the wonderful belt changing tool a two belt approach would seem to be optimum if a lot of thicknessing needed to be done.