I am an noob to DB defcom and I am glad I didnt try and lower the action too much on my Stagg (which is easy enough to do), My DB is a bit higher and with a bit more tension too (or compliance blah blah), switching to the Stagg feels easy now after a few months on the DB so stick with it and see how you get on, you could lower it nearer to 8mm maybe if you are still in trouble but a full on DB will be a devil IMO if you go much lower, I might even raise my Stagg action which 6 months ago I would not have beleived! Good luck and you do realise you will end up with a DB with a year dont you?