Love whippets!

I have a walkydog and a K9 Cruiser...just ordered a Bikerdog...

I was bumping into the walkydog until I realized you are supposed to angle it back a bit...so if your bum is 12:00, having it pointing to 7 or 8 instead of 9. (hope that makes sense)
The K9 cruiser attaches low and keeps my dog behind me, which neither of us like. But I think it is the easist one.

The Bikerdog attaches to the back of the frame at the bottom but keeps the dog in a relative heel position...so I think that will be my favorite!

I'll have to sell the others on ebay...along with all those sherpas I tried for the papillons...

good luck with your saddle! FWIW, I love the Brooks and I liked the specialized body geometry with the cut out .
If you are riding upright, you might want to check the Brooks B67....
elizabeth