I have a friend who had heart surgery a few months ago. He has had a LB push mower, but has been directed to get a self-propelled machine when he is able to get back to mowing. Does anybody have any experience with the new Personal Pace system on LB mowers? I think it is offered only on the top-of-line LB aluminum deck mowers (Gold series?). I know they have been on Toro home owner machines for awhile. I presume the mechanics of both are the same, variable sheaves. I've not been "under the hood" but have been told about how they work. It seems like a good idea, something I would like on my commercial LB.