Question for you CRPSpatient - you said you are using the most ergonomic crutches out there - have you tried Millenium crutches? Here is a link you might want to check...I have no idea if these would be helpful to you or not, but I wanted to share the information, just in case.
Link is here: http://www.millennialmedical.com/
As for the pain and numbness, I have CTS as well, and have noticed a lot of arm numbness and tingling - both arms, from the hands to the neck. I've also got shooting pain going down my left arm when I tilt my head back. I am waiting for an app't for the nerve conduction tests, but I can't tell what is pain from CTS and what is pain from every other dang thing I have that hurts.
I hope that you are able to get both answers and relief. Be gentle with yourself.
DX: Fibromyalgia, Severe Myofascial Pain, Osteoarthritis in Hips and Lower Back, Chronic Pelvic Pain, Surgical Adhesions, IBS, IC-PBS, Carpal Tunnel (both wrists), FAI, Type 2 Diabetes, Reynauds, Visual Migraines, Drug Related Hot Flashes, Hard Start for IV's, Unable to vomit due to surgery.
Meds: Oxycontin, Tramadol, Tramacet, Cymbalta, Cesamet, Flexeril