Thanks Flyin Beagle and proptop, I just might get those instruments. I fly near an airport and we are supposed to not exceed 400". Iwas flying one day and someone from the airport did come out to warn one pilot that he was exceeding the limit. From what Ican remember, that pilot was flying much higher then I fly. Just out of curiosity Iwould like to know. Maybe on the next plane Ibuild.