Well, here's an experiment (with a tip of the hat to radius, half eye, and adb, thanks for the buildalongs) that I just finished up today.
60" tip to tip, 59" ntn, red oak, linen backed. 27#@24 (39#@28)
TIP: Don't go out and shovel six inches of wet "heart attack" snow off the drive, cool off, then come back and judge weight purely by feel!

This started out around 40#, but by the time I got it smoothed out...

What's worse, when I was working it, it felt right, but when I strung my other red oak (41@24") I could barely pull it! Chalk it up to experience.
The handle is a little light, ever so
slightly bendy, but it was a board scrap I had, and it's a comfortable size. I probably didn't have to back it, but the board looked just a little less than picture perfect, so...
As always, your experience and observations are most welcome!
Frode
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