Tinyhawk Freestyle tinywhoop duct mod

I don't suggest doing this unless you don't use your Freestyle to... freestyle. However, I was inspired by [wob's work on rcgroup forums](https://www.rcgroups.com/forums/showthread.php?2971472-23DT-the-3d-printed-Micro-130-with-true-ducts-Emax-BabyHawk-Gear ) and wanted that extra flight time on my Tinyhawk Freestyle since I predominantly fly indoors with prop guards. I made a very uninformed first purchase in FPV but it's been really fun designing parts for this powerful little machine. This part is intended to be printed as a single perimeter, using eSun PLA Plus. I haven't bumped or crashed yet and I don't think it'll do well when I do. However, the improvement in flight time and characteristics is undeniable. [UPDATE 5/23/2021: works great, still flies even after print is splitting. Taught a person how to fly quads using this adaptation. It 'floats' through the air and is very forgiving. Reprinting and replacing the part is cheap and easy.]

Used the [OpenScad file from beta_read