Because of the apparent lack of free modified flywheel models on the interwebs I decided to make some! I based this design off of stock flywheels, with a few measurements from some informative Youtube videos (thanks Bobo!) and this is the result. My printer's finished model is a bit rough, and the tinkercad software has some low res shape settings for the concave perimiter, but with a flywheel gap of roughly 10 mm, it should result in more traction without ripping up darts, we'll see. Will likely require a little finish work, and your results may vary. I've found that they fit the canted Rapidstrike / Stryfe flywheel cage beautifully, found here: https://www.thingiverse.com/thing:2479577
I will possibly get some pictures of fitment into said cage and a firing video up soon. These will probably pair well with upgraded motors, like torque-laden fangs.
I plan on making some vented variants later, but in the mean time let me know what you think, if you see any room for improvement, and don't be afraid to let me know about your projects and post pictures.