Sorry if this is a common query,I had the rear stays spread to -I think 130mm-it looks like-and a modern 8 speed cassette installed,what I really wanted was the modern cassette,but on a set up that allows me to use the original wingnuts,or at least some sort of wingnut,the bike shop thought this pretty tricky,and I must say the shop is excellent,well versed in old school stuff-if this is doable I thought I might aquire the bits in the summer for a refit in the winter,I wondered if there was an engineered solution-anyone out there done this?