Wow, just opened this forum again, first time in a while, there are more of you (us!) I have been to two different physio's and they have helped me tremendously, even to the point of me racing for the last few TT's of the year. Get them to flush the quads (Ouch) and it will definitely help. I have had the odd episode since where I have been able to ride it off but have been very careful and not had more than 3 days off the bike. I really think it's a fiber thing (Physio speak!) and flushing them aligns them back to a normal state and gets rid of the scar tissue that is otherwise floating around causing trouble.