So an update is due
Block is at the machine shop getting bored/honed and piston to wall clearnace sorted.
They'd just finished building a block for M&M engineering(ex drift champions apparently)
So just waiting for that to come back.
In the mean time I got plenty of deliveries
Received a micrometer, rod bolt stretch gauge, telescope gauges and some plasti gauge from rich on here, cheers bud!
Also got a new torque wrench and some feeler gauges. Waiting on a piston ring file now
So had a practise with the telescope gauges to make sure I can measure consistantly and accurately.
Decided to measure the rod big ends inner diameter(without bearings)
Torqued the rod bolts down to 10nm to eliminate that variable and got to practising.
Funny enough it was the micrometer I wasn't using perfectly and after I figured this out I was getting pretty consistant results.
Measured each big end 11 times and I'm pretty happy that by the end I can confidently say I can measure a bore down to 0.0002-0.0003"