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I use suspended balsa for my CroOx and FeOx. It does deflect a bit, but not much if you tighten the thumbscrews.
Loosen them all for heavy wedges! ;)

300538

I use a Lipshaw strop a lot. They have foam rubber under on the later ones and a 'Jute' like stuff on the older ones.
A bit of cushion is nice.

Am thinking we are headed toward a discussion on...

The solid-backed ones need a touch of 'torque' as stropping. Not something a newer shaver (or anyone else!) should need to learn.
A piece of something on a piece of wood does not a strop for razors...

Having some 'give' to the strop is desirable, IMO.
Air-space or padding is a good thing on a paddle strop.
Exactly like not pulling a hanging strop too taut. We need to hit the very edge.