To bend the lid all you need is a hammer and an oak 1x3. Start to finish, 25 minutes.
The first edge, bang with hammer on wood edge.
Second edge, bang again.
Third edge, you guessed, bang again!
And the back edge, more of the same.
So you end up with 4 turned up corners that I grind down on a belt sander.
The sander.
Corners leveled.
Sand bottom flat.
Sitting next to a JLong lid.
Test fitting