I used the AN vernier isos , no machining required. The motor was supported by a small platform type jack so I could raise or lower it as needed. Once the front iso is removed the motor tipped slightly and moved slightly to one side. It takes very little movement to make it difficult to fit the iso. So out comes the lever and it takes a little trial and error to get the right combination to make things fit. As soon as possible I push the line-up bars into position, then home free. I try to do things carefully and gently. I ALSO REMOVED THE PIPES AND MUFFLERS. Perhaps another 1/2 hr to R&R the exhaust. I usually heat the head to make the ex nuts easier to remove.
Also notice it took him a while to get the iso started. He sped the camera up at this point. Don't know how much time it really took.
At $40 per, while-you-wait and drive it away I think it was a reasonable amount of time. This is with the customer standing around chit-chatting and observing the whole procedure from start to finish. Then he rode it for 10 minutes to get it hot, I tightened the ex nuts and off he went, a one hour ride to home.