Meeting rail detail 2

So with some more thinking, (with coffee this time), I sketched out some more ideas and came up with even more ideas. The result being:-



A brush to brush seal that will always remain uncompressed. So allowing moisture to pass through without letting draughts in.
The brushes will compress against both sides of the parting bead ending up as like a felt block for the windows to run up and down smoothly.

I might move the brushes down a bit to give a bit more around the upstand of the rebate.