Searching for something completely different in a small drawer, that very cute vintage and still accurate German Linhoff camera spirit level was found, I must use it !
The price tag, 33 francs (around 5 €) and the all aluminium build let think that it's something sold in the early 70's (the orange color of Odeon photo, the shop's name, is another significant clue).
You can see that my wood bench is quite well leveled.
Once again, those nicely machined aluminium parts are going to be used, as it's exactly the right thickness.
Cut with a metal hand saw and, as it's impossible to bend, the mini vice-grip will help cut the inner edge easily.
It fits exactly.
as the existing holes where too close to the level path, it had to be drilled again, not very elegant, but... it's a prototype.
Drilling, taping, just in the center, between the ears.
Parfait ! ugly, but nobody will ever notice it.