With the feed trim down to 2 (M55 Insert) and the combustion trim up to 4, I think....my glass maybe staying clearer slightly longer. For the past two days I have been running with the combustion setting at 5. The stove seems to be running fines but I guess I want to know if this is Ok or should I go back to 4 or 3. So far I haven't had any luck finding anyone who ca do a magnahelic test. I am assuming that this is something that a newbie like me should watch being done but not attempt at this stage. I have a bunch of Enviro maintenance videos but I don't think any of them show a mag test....Thanks, Bill