I'm considering doing the same, it'll open up a world of engines that will do ~1400'... I'm planning on buying 3 3" LOC payload sections and just adding them on. Have one with a camera hole, and you can change it so it has 0, 1, 2, or 3 payloads... completely flexible for any engine.He he. Yeah it wasn't very cost effective. Don't tell my wife.
At least I have some spare parts. I'm already using the orginal fins on a different build, and I think I'll use the short BT to add a payload section to this one for DD.