no probs mate, I quickly went to cheap square filters then to a 100mm system. I much prefer it though I still need to get myself a 105mm cpl. A lot of the time I end up bracketing just because its easier to deal with than getting a correct reverse gradient to even up vertical features. Those formatt hi-tech firecrest filter that
@Vieri uses look pretty good indeed, I've mostly been using Kood filters which are shorter (125mm rather than 150) but significantly cheaper though I do also have a few Lee filters too. The Filter Dudes holder is good, has a firm hold and good accesories. The only gripe I have is he doesn't have a hood option that I've seen.