Trying to remember how much weight I put in the nose cone of my BD with a 54mm. It flew once at Argonia - Beautiful flight right into the where everyone lost it. My advice is but some sort of Sonic locator in there. But yes, nose cone base removed and everything snug. Building another one.That's an idea! I could maybe even use a larger eye bolt as part of the ballast weight. That should leave plenty of room, as well as help bring the CG forward a bit. I just need to figure out the AltimeterThree mounting then, as I was going to mount it to the bulkhead.