I've been using the drum dial for some time now, and i love it. the only thing i have trouble with is my bass drum. Everytime i try to tune it lug by lug, one lug always seems to be shown a higher number then what it is. 72 for batter head/70 for resonant head is the standard tuning for it, but everytime i put it that low most of the lugs are very loose and won't stay on. is it the head or the drum thats making this problem?