Morning Men!
Started to re-bolt the motor back together. Long story short.
Removing crank pulley to inspect oil pump and replace seals etc. I felt a movement in the crank, which in turn caused a movement in my pants, (not a good one, more the kind that leaves a racing strip in you work overalls).
After trying to get Zoom Zoom on the phone, no luck panic really set in. On to Google, after 1/2 hour of classic 70s porn I was feeling much better.
Google Miata shaft play, found Mazda press release of .300 of an mm play was cool.
Straight down to Hare&Forbes (Favourite place in the whole world), to buy a tool I will more than likely never use again, but when your mates come around, you can go,"check this s#it out, look what I've got".
0.15mm of play, so all good in the hood, back to pool cleaning!