Kind think the grinding of the stops was unnecessary, the bike's been running for 22 years with the stops on it. If it was necessary to grind them off to get sufficient adjustment, it probably something else is off a bit.My friend and I rebuilt my carbs on my 83 Aspencade. It ran better but still not right. I then took it to my mechanic and he went through them again. Two of the things I noticed was that heground off the stops for the jets on the bottom to give more adjustment and he made up a special needle air nozzle to attach to his air compressor. It allowed him to get into the real fine holes with compress air.
You didn't mention it but to remove the carbs from the bike is tricky. They're removed from the left side and I understand if you unbolt the front mounts it's easier to get out.