Did the comp today after a couple of practice dives the day before. As far as I can tell, the problem was caused by 2 things - head position (thought it was ok till I saw a video... tucking my chin in made a big difference) and the fact I was actually using my cheeks to equalise rather than doing a proper Frenzel with the back of my tongue (couldn't generate enough pressure). Worked on these two things on saturday then managed 75m in the comp, which I was pretty happy with. I didn't get it quite right though - and had to turn upright at 70m and reverse down to the baseplate while struggling to equalise
Still, it was a successful dive, fine on the breathhold side of things and deeper than I've been before so cheers for the input, seems to have worked a treat
