Thanks Troy.

The Jett muffler is about 1.5 oz heavier than the stock OS46FX muffler.

I currently have 3 oz of lead in the tail. So I have some room to wiggle around and save a bit. Removing 2 oz from the nose (replace heavy prop and spinner) will permit about one oz of lead to be removed. So that's 3 gone. Some of the remaining 2 oz of lead can be eliminated by moving a servo back, and pushing the battery a bit further back. So I think I can shed 5 oz with out much effort. And I get a stiffer rudder setup in the process. That shouldn't bee too bad at all.

To get lower, would have required some thought when it was still in the box.... you're correct on that point.