JJS,
When you say discontinued Chota knee high socks/with fleece liner, are you referring too the Brookie Knee Highs? If so I didn't realize they've been discontinued?
Also, did you buy the OTB's the same size as the Chota's ?
I've always bought the water shoe a size bigger than the Chota, for a proper fit.
Sometimes this can be a problem depending on how the water shoe is sized.
If I understand you correctly, the dual insoles allows a more precise fit without sizing up from your normal size? Is this right?