fordie i find it makes a hell of a difference to my riding if i hang off,on a open local road i can take the same corner 20-30mph quicker with my leathers on knee down than i can in jeans. although at silverstone i found i was actually cornering a bit quicker hanging off but not getting my knee down through some off the faster corners, dont know how that works but it did !!!
nick, just get a instructor to watch you at a trackday or do a race school like the ron haslam one at donnington.