Thanks
Those are 30 amp (1200 volt) diodes, and I might be pulling an amp or so out. I don't think they will get too hot.
This wont be in long term continuous use anyway.
The board is made of bakelite.
As you see the diodes from the top down, are Phase 3, 2, 1.
The blocking diodes are shown, the Isolation diodes are on the other side, held on by the same nut and bolt..