I searched several threads on the site and didn't see this discussed anywhere. Has anyone adapted a Surly Singulator in place of the kit-type chain tensioner? Looks like one could weld on a mount tab and bolt it up. Here's an Ebay knock-off for half the price:
Single Speed Guide "Surly Singulator Style" No Reserve - eBay (item 330490719549 end time Nov-04-10 08:53:35 PDT)
Single Speed Guide "Surly Singulator Style" No Reserve - eBay (item 330490719549 end time Nov-04-10 08:53:35 PDT)