I need to ream some tapered head tubes with IS42 top and IS52 bottom bearing seats. I already have the Campagnolo headset tool. In the past I've purchased the Cobra 1-1/8" cutter and guide which fits the Campag tool to ream 1-1/8" head tubes, but Cobra don't appear to make the integrated headset cutters. Can anyone tell me if the Cyclus cutters and conical guide will fit the Campagnolo tool? I can buy the complete Cyclus tool and IS42/52 cutters for a reasonable price, but the Cyclus catalogue states that the max head tube length that their tool can cope with is only 190mm, which is insufficient for my needs. In the past I've used the Campagnolo tool on head tubes up to ~260mm long.

Hi Nick, pretty sure the Cyclus tools won't fit directly but a good engineering workshop could likely adapt them to fit. As an alternative, the Cyclus centre could be copied or even extended (with a sleeve and a second section of threaded centre) by a competent machine shop,