Here are few DIY table extensions. You might find info in them for what you are wanting to do. I just "googled" how to make your own sewing machine extension table and found these & lots more. There are also you-tubes available to watch.
http://spontaneousthreads.blogspot.c...46827296925916
https://quiltingjetgirl.com/2019/07/...able-tutorial/
https://feltmagnet.com/crafts/quiltingtable
https://www.andsewwecraft.com/2013/0...tension-table/
https://www.ehow.com/how_7716176_mak...lexiglass.html
Something like these leveling feet could be used to screw into blocks or wooden dowels for your feet & you could adjust them to get them level.
https://www.lowes.com/pd/Waxman-4-Pa...E&gclsrc=aw.ds
Last edited by osewme; 02-17-2020 at 04:04 PM.