Hey David, how's this working out for you? Still keeping up with it?
Since going back to uni now, I've kind of regressed back to my older, "normal" diet. Lack of freezer space for frozen vegetables and regular eating times makes the previous "controlled" diet hard. I'm used to eating less (and always have been, to an extent), but I'm not sure that's helping. Exercise is almost non-existent.
As a side note though, interestingly my peak-flow rating is a fair bit higher than my predicted value, especially compared to my peers who seem to exercise a lot more than I do.