Holey Moley, these rails are solid and heavy!
I have flatten 5 cutting boards so far. I remember after I flatten my first one , I just kept saying, "Wow, Wow, Wow!.....
So nice not trying to "skim" the boards thru the 20" spiral planer a dozen times, after glue up, and hoping for "not too much tear out" .
The 2 1/2" bit from Ape Tool does an amazing job. Really speeds up the sand process. Glad I purchased the whole system and watched your setup video.