ElliotSF: If you want to be super extra sure, you should totally trade with me. I have two Nitto Technomic stems, 25.4 with moderate reach. In search of 26.0 Nitto stem of similar dimensions. For everyone else: Don't stick handlebars into non-matching stems if you value your face. Shims are acceptable, but you should always check them every few months, grease, etc. to prevent seizing. Over-clamping does not work.