Did they have a 4707 on the lot? I ordered mine back in November and I'm still waiting.
One of the guys that I buy hay from had his Massey 4710 tuned to get 120 HP out of it. He said that 100hp was marginal for round bales, but at 120hp, he has plenty of power. He hired a guy out of Dallas to come out to his farm and do it for him. I think his tractor was a 2018 model, and he said that he was done with the warrantee.
I can't imagine needing more power for the 4707, so I don't have any plans to increase the power, but it's nice to know that it's the exact same engine in the 4707, 4708, 4709 and 4710