Shut downs - I’ll get there
Although I eventually managed to successfully do the valve drill on my course, I seem to have struggled ever since and these have been a source of frustration. On a recent weekend away I had the chance to dive with Alastair and we got talking after the dive. He mentioned that he also had a few problems with them and sorted them by just practicing while at home 
So over the last couple of days my kit has been set up in the lounge and every so often, yesterday was every hour on the hour I went through the drill for about 10mins. I have no problems but that doesn’t mean I won’t have problems again when I am back in the water, although I need to sort my trim a little while trying to stay still. I don’t think my suit is helping, mainly because I do fill it and maybe it is a little more difficult with a rear entry suit. This week I am going to be measured for a new suit which hopefully will solve the problem together with some muscle memory exercises.