The Proctor wheels are a thing of beauty and probably worth the slightly higher prices ($114 for a pair of 5" wheels vs. about $90 from Herbie's). I held onto a pair of the Proctor wheels for more than 20 years (thinking I'd eventually use them on a Hasegawa DrI kit). But I eventually sold the kit to get into RC modeling. And now I'm building my own flying DrI so maybe it's time to get those wheels again!