Now you finally have come clean why you post this hair brained stuff, you are trying to drive me off. I am always interested in novel approaches to important stuff. In your case, many arguments die after the first critical view. Then you start answering line for line - with even more crazy stuff. Funny thing is, you always cave when facts are presented, and counter with more conjecture. Countering the ridiculous has been great fun here. If you want me out of your threads, post them where they belong - in the lounge. Then we all have a laugh. I have no power, not even a smidgin. I can give people a break, but that is NEVER part of the argument. Moral of the story: post questionables, and you will get called out. If you can back the thesis up, great. If not, like with this thread, your problem. One more time just for you: Tuning of a trumpet needs the whole working system. Take one brace out of the picture and you can start over. There is no Golden Rule for the length of leadpipes, tuning slides, maybe there should be, but that was not the topic here. Just about every horn that I have had with a tuning bell, was inherently better in tune than similar horns with conventional tuning slides. That shows me that the first half of the horn length is very critical and can be all over the map as far as intonation goes. Your mileage may vary, but considering the presented content, I have my doubts. So, don't count on safe haven here. I have too much respect for those that really want to become better trumpet players.