You've gained about 0.11 according to your numbers, more than doubled and now way out of spec. While calculating or just when you built it up finally?
I would sort it. It’s not going to get better on it’s own and depending on what wrong could make it worse at least re shim it back to spec.
You can't shim it out: you'll lock the crank up. A thought: did your engine guru clean up the end - the "snout" - of your flywheel when he was doing your engine? Anything he's machined off/skimmed will add to your measured endfloat, even though the "proper" endfloat is ok. If so, there's a fix for that.
You have to decide. Did you cock up the initial end float setting or is the bearing moving because the machining wasn't up to snuff.
The setting was Deffo 0.10. I don’t know about the bearing moving, as I haven’t got the flywheel off yet. Going to try and do it tomorrow eve, if the sun hasn’t bbq ‘d me.
Then the bearing is moving and once that's happening it will pound itself looser, not just sit there. Shimming won't help because you already set the gap between the bearing and flywheel with shims. I'd be hoping I'd cocked up! You could for experimental purposes add enough shims to definitely lock the crank then measure your "end float" like that. Any measurement must be the bearing moving in the case. No movement - you cocked up, do it again and do it properly this time.
No, I meant measure the endfloat with the flywheel on, again. You won't be able to measure anything meaningful with the flywheel off.
Could try it. I'd doubt you'll be able to see anything. If your bloke has done his work correctly, it shouldn't be moving at all.