I wanted to make the jet drives removable so the next few photos should be self explanatory.
I would have thought the sensible way to marry the jet drives to the buckets would be to bolt them together with the transom sandwiched between them, but this is not the case.
It would appear that the drives are designed to be bonded to the transom, this would work but they would not be removable.
My answer is to make a 1mm brass plate with a hole in the center to sit over the jet drive, 7 mounting holes drilled to match the bucket mounting holes with brass nuts soldered to it for ease of fitting.
Screw the buckets through the transom into the brass plate, after first putting tape on the edges of the hole in the transom to stop the drive bonding to the hull Key the back edge of the drives put a small amount of epoxy resin on it and push it into place through the brass plate and let it set. When cured unscrew the bucket from the brass plate and remove the drive complete with brass plate and put aside until required, I’m going to fit it using silicon gasket sealant which will last indefinitely but allow removal if required.