I built up my boost 27.5 wheelset for single speed use with my beautiful Boone Ti 18t cog and some spacers I stripped from old cassettes for my eventual single speed build. But that got me itching for a single speed now not in December when I expect my frame to be finished. I looked at all the loose cogs and looked at my old 25 year old frankenbike which was currently set up for hauling chairs and coolers to tailgates and cracked open a cold one and started some more frakenbiking. The old X-9 drivetrain set up for 1x9 with 11-40 cassette were ripped out and tossed back into the junk bin box. I Dug around and found a mixture of various things that looked like they would work as cassette spacers with a 17t cog I found in my pile of loose cogs. I pulled the high limit screw out and found a longer bolt which allowed me to adjust the limits on the rear derailleur beyond the factory limits and made an old school ******* engineered single speed setup. Works perfectly fine on pavement, but I've been itching to try it on some single track. It's been a while since I've slammed my fruits on the top tube because of a dropped chain, and I'm not sure how much I want to trust the ******* setup outside of smooth tarmac. Will spending a few extra bucks on a real long toothed single speed cog and purpose built tensioner make an appreciable difference in chain retention or should I just roll the dice and try the ******* setup. Frankenbike never gets new parts and has lived the last 20 years with various take off parts so I hate to break tradition unless I absolutely have to.