At the risk of being accused of becoming a tray-packing nut,
there’s one more interesting tray puzzle that I managed to acquire recently.

Octet in F is Stewart Coffin’s design number 258(!). Your
challenge is to arrange 4 F-tetrominoes and 4 High-4-pentominoes into the
slightly skewed frame… which has a couple of little intrusions in the corners,
presumably to prevent some false solutions.
This one’s a tough little sod – you have a reasonable number
of pieces to contend with and a pair of different shapes (albeit the one is
just a slight extension on the other).

Given how hard it is to find a solution, it’s quite amazing
to see just how much spare room there is in the frame when this puzzle has been
solved.
Classic Coffin tray-packing puzzle at a jolly reasonable price!
Picture of the solved tray?!?
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