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I designed this as an upper sail/neck for a warp Engine, with an iption for an accessory. Either a single Phase 2 style Torpedo Launcher or a smaller TOS style Deflector Dish. I put them on a sprue for convenience. If you use it, I would love to see pictures.
As with my other products, I designed this to work with the 1/1000 scale TOS Uss Enterprise model from Polar Lights. Some modification to the model will be necessary. Also, don't let that stop you from using it for something else you have in mind!