Thanks CJ - have been communicating with him indirectly via "Ferozamaniac" on outers - but hadn't found this.
He's supposedly looking - but apparently has not started and is very slow ( even compared to me )..... and I would guess he will do a rear first - then perhaps a front even though the Salisbury style front is easier to modify.
But the pics are exactly what I'm looking at doing so they are really usefull.
Note : one of the pics shows the actuation air cylinder attached to the cover - once again exactly what I had in mind, although given my lack of success with air compressors perhaps electric would be the way to go
It not a Hatsu locker is a Tibus / Teraflex
This ones designed by Wolfgang Tibus @ Tibus Offroad, Steve was this the person you were thinking off ?

- A T lockeer exploded view