Ended up not getting the Kavanics. Instead, bought Scariu’s for $168.89 and free Prime shipping. Exactly the same wheel. Used the Kavanic center hubs. Just slightly better efficiency than the Gemini’s. Very slight.
https://www.amazon.com/gp/aw/d/B0BQ65N79C?psc=1&ref=ppx_pop_mob_b_asin_title