I also use the Rio Windcutter with tips, primarily on my 7136-4 (which I just exploded in October!). You're right, it sure makes things easy and the tip wallet is primo!
On the bigger rods, I use a full floater Windcutter -or- a floating long taper DT during the summer; and a compact head system shown to me by Mike Kinney for throwing dense tips in deep cold water.
Out of that mixed bag, the home-cut DT, the winter head, and any tips I make to fish with the Windcutter lines need the loop treatment.
BTW - there is an orthopaedic surgeon looking for information on flyfishing and joint pain up in the Open Forum. I wonder if his research differentiates two-handed casting? I'll go ask...