Thanks for any responses in advance. I have a black Friday special arriving in a couple weeks and I've entertained the thought of submitting a tail cone addition to my L3 project plans. Not immediately noticing manufacturers offering this item past 4.0 inch diameter air frames though. I have a plan B...cut a 8" nose cone down and retro fit a centering ring beveled to allow a 4" tail cone to fit a 98mm motor mount. Not a bad option...but wanted to check if other folks that have performed this or similar ideas know of commercially available 8" tail cones? Thanks again ALL!