Ok, so here it is all Fixed!If your already putting in an order, just get another .160 anyway. easier to swap it during the rebuild when you already have the pump head off.
Either way, for 20 bucks, they are always something you want to have on hand as they can fail catastrophically without warning.
If it's the wrong one, swap it and keep the other one as your backup to get you up and running in a jam if needed.
I had a look to see which cam bearing I put in and it was a .085
I greased up and put the old .160 back in and it now works perfectly.
So long story short, after replacing the pump head's seal kit with "kit-A" it fixed my issue.
Thanks for all your help goomer, much appreciated.