Well, after a busy few days doing 'other stuff', I managed to get some garage time today.
Firstly the GS wouldn't start, but there's hardly any fuel in the tank, so it might need some clear fuel line so I can see if it's getting to the carbs. I'm a bit disappointed that Mr. Canneloni didn't fit a fuel gauge to it.
Hippo started 1st press, so it may have self repaired, so that's a positive too.
Anyway, Yeti - took the points plate off to get to the cam base and with a bit of gentle tapping - ok, twatting the thing with a 'special' removing implement that looked like a specially ground screwdriver - it came off. Measured up, it's about 0.25mm thicker than Barney's 'proper' one and in different places, so it appears that it may be a 380 cam. I don't have a spare Hippo cam (I don't think) and they aren't easily identifiable unless someone knows different.
Tested points voltage and all were 11.6v. Not too bad I reckon as the volts have to go from battery + to ignition switch, kill switch, coils (as well as other places), then to points. Battery 12.46v.
Tried to set the timing, and left and right were easy but centre was miles off. Compared points sets and the centre one was different as was it's own back plate so not enough adjustment, so were relegated to Mr. Bin and checked stock for better. Sorted out points etc. into ND and K boxes for future use. Compared some spare ND and K plates and found that they weren't all the same so it appears that there are a 'few' 380 (or Hippo?) ones.
Looks like I need more boxes....
Finally managed to get a backplate that allowed all points to be set correctly - gap and actual timing - and set all the lot up. Only took about 2 hours, but I did repair a plug spanner and sorted loads of electrical parts as well.
Petrol on prime, choke on, hit the button and fired up straight away and revved cleanly and ticked over perfect. No time for a quick blast as it was teatime.
GS started 1st push as did Hippo. Poor Earwig had no attention today, but will have 'her' clutch adjusted tomorrow hopefully so will be ok for a run out.