At last i have finished this beast.
It was a huge task trying to get a car running that you simply can not buy any parts for. The only thing i could buy was apex seals,corner seals, and corner seal springs because they are the same as 10a. (still available NOS from mazda).
13a rotar next to a 12a rotor.
The plates were very good, but they had corrosion where they mate up against the water seals, so they were surface ground to make sure they seal properly.
I could not buy oil control rings anywhere. Even mazda japan, australia, germany etc had nothing. they were worn, the engine would have been pretty smokey.
kevin at southcoast rotary suggested a regrind
I took them to the guys i use for plate machining, they set them up on a magnetic chuck on a lathe and ground the taper back into them. you can just see in this pic the fine line on the edge.
They wont be good as new ones, but it has a better chance of sealing now than it ever did.the car will only get driven twice a year to shows, so it should be ok.
new welsh plugs fitted to plates...
You can not buy 13a water retention kits, so we cut and joined two 12a kits together. we used a loctite brand glue that has to be kept in the fridge!
the join before glue
It runs super smooth and quiet.
i will make a video of the car through the week.