FWIW to anyone my DIY Excel Wheel tubeless conversion long term update: I rode 7000ish miles on mixed surfaces and temps with ZERO problems this season. Both tires (Shinko 804 front & 805 rear) held pressure just fine with little to no leakage, (no more than my OEM rims and tires) If you remember it was a trial and error X2 with the rear rim. I had 5 spokes that, for whatever reason didn't seal on my first mounting of the tire. The front had a 90 degree valve stem that ended up not working right and never sealed properly but ALL the spokes sealed the first time!! . So both tires had to come off and fixes were done and then they both worked as advertised the 2nd time around. So it's more than likely NOT a one and done DIY project by any means. Most people that I spoke to, communicated with, or watched on YouTube had very similar results with their first attempt. Many never did achieve a proper seal and went back to tubes. So I consider myself one of the fortunate ones. Especially since my front rim is a 2.15" width and has no proper safety lip for tubeless tire application. The tech at Woody's Wheels would not condone sealing or putting a tubeless tire on the rim for obvious safety concerns. He did say that guys have done it before with varied success, but in no way would he officially sanction doing it. All in all I'm VERY PLEASED with the outcome. Hopefully this helps anyone on the fence considering if it's worth trying. I AM NOT a professional mechanic nor do I posses any special skills, I just consider myself blessed with SOME abilities that allow me to do things. And some of the time those things actually work out as planned. Many times not. But that doesn't deter me from trying.