My UCD is probably a bit lighter than the your Cap, but I'd bet my wing is thicker and slower in level flight.

I can't comment on the braking effect differences on downlines yet, it was getting dark when I put the 15x8 on and I only took it up for a minute or so. Hopefully I can get some quality time in this weekend and with any luck I'll have a 16x6 along to try as well.

I'm guessing that the 16x6 will be just what i'm looking for. I don't think the YS91 will have any problem swinging it.

David