Another thing...
Hope you are right with localised but not targetted injections - your reasoning makes sense.
This seems to suggest otherwise:
http://www.ncbi.nlm.nih.gov/entrez/q..._uids=12382953
at very low dosages.
But injecting the tendon myself would be very difficult, painful and would most likley lead to me rupturing them if I put too much in, or over did it.
Cheers,
ERGO