scooba,Frozen shoulder was a mystery to me too, till I discovered it to be a referred event , along with many other MSK pain and dysfunction problems that have confused physios and others for many years. I have mostly been working in isolation and have had little interest in putting my work into the mainstream published media , till the internet allowed me access to blogs and forums such as this one .
I have posted many pieces of explanatory and technique related work on Rehab Edge , over the past few years. Should you be interested in reading further I suggest you begin there.
Cheers
G.