• insightful as always @clubman thanks.
    I had hoped to fit a fancy Lam or Lytaloy caliper, however I fitted the more common or garden "GB Hiduminium" calliper in the end and the corresponding lever, its a snug fit but works.

    The rims are Weinmann Scheren Tubular sprints attached to GB Airlite small flange double fixed hubs. The front is quick release. spokes are double butted and 1.8/1.6mm in diameter

    I used an old clamp to fashion a chain tensioner bracket

    Cyclo chain tensioner.

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