I'm going to try it rubber tires on carpet. I've been required until this year to run a front diff. So I want to see what the hype is about spools and one ways. I ran the center one way in the old car and didn't like it. I never R&Ded the setup to work with it, so I can't base my judgment on that alone. Will the setup be that different? It's refreshing to hear someone got a spool to work. I look forward to trying it. I have plenty of summer left to work on it.