After reaading all the good constructive comments I decided to continue on with my Drink Coaster project
But first I need to acknowledge, (wait for it) ... all the members who offered support and encouragement. (snicker snicker)

I rolled out my trolley with my disc sander on it to continue on, however it threw a tyre, so I had to call out the trusty Service dept to fix the issue.

I had as luck has it a spare in my huge" boxawheels",  not sure what caused it to shred the tyre but off it comes.

nothing like adding amounts of time to a project with side issues, or in this case bottom issues.

Any way pressing on I fired up the disc sander and carefully sanded the pucks.

I may add at this time I did attempt to use my ROS but all it did  was rip the bark off the edges in places  of which was what I didn't want.

consequently I had to spend  more time fiddling about re glueing them.
So to mitigate  the denuding I decided to glue cork on the back.

Quick Grip and  away we go.

cut them separate with a box  cutter blade

After trimming off the excess I profiled the edges.

Once that was all set I batt drilled the edges to get a neat profile.

The disc sander did a 60 Grit job on the opposite surfaces with little de barking.
As rough as it was the timber still experienced a little burning.

I then needed to fill the gaps, for this, I used Timbermate wood filler.

the used a 1/2 sheet sander at 60, 120 and 240.

I decided to seal them overnight and continue on tomorrow so I managed to obtain
the developing surface finishes.

Will it work, ...possibly may as its looking good so far.