Biscuit Joiner to cut slotted recess for sliding Door?

Hi Folks,
Solid wooden door, circa 30Kg, wanting to use as an internal sliding door off Bathroom.
Would have liked to use bottom rollers, but looks like they do not exist in a suitable format ( No top guide with pelmet)
Top rollers are visible with adjusting nuts, as a finished set up ?

If I use Std top straight sliding top roller, Bunnings, with those dodgy plastic guides at the bottom,
https://www.bunnings.com.au/cowdroy-...track_p3980000
I'll need to cut a slide recess in bottom of door.

I have a biscuit cutter purchased at a garage sale $20 some years ago.
Any advice how to cut the groove?
I am thinking flat board and door on side clamped to saw horse, and run the cutter along the ege?
Any members see any problems?
Thanks


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