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Thanks for posting this. I recommend that you post it in the local MIT Cambridge Tennis Group where locals are more likely to see it and respond.
By the way, there is a big gap between 3.5 and 4.5. I'd imagine if you are rusty a bit, you might be more like a 3.5 to a 4.0, as a 4.5 is a bit too strong to have some rust on the wheels.
Where is Cambridge??
I think the Cambridge referred to here is adjacent to Boston.
But I realize that you weren't asking me.