| Priscilla may be right, you may have practiced too much and you’re just worn out (not the horn). Get your lips well rested. Do some leadpipe buzzing as part of your warm up to make sure your fully "connected" with the Kanstul. After you're warmed up, do that range testing again, switching back and forth between your reference horn (your best Bach) and the Kanstul. A/B testing is the only way to draw fair conclusions.
If you still have range problems (differences between the reference and the Kanstul), then try to analyze why (too much resistance, too little resistance, different slotting, etc.). The too much or too little resistance issues can and should be addressed with a mpc change if the horn has other superior qualities that make you want to keep it. I've seen too many people diss a horn because they didn't understand the mpc/horn/player system. In this case, I suspect that the 1503 should feel reasonably close to your two Bachs except it's got a 72 bell and a 25 leadpipe. What are on your Bachs?
Hope you can work out your issues with seems to be a nice horn.
BTW, why don't you sell one of the Bachs? Your parents have been extremely supportive of your trumpet "habit", so why don't you contribute to the family cash flow by paring down the inventory a little. Sounds like one Bach is clearly superior to the other. In my own experience, when one horn blows the other away, the less favored just sits in the closet.
Dave |