What you did not use blue ones.Replaced the stock Ultegra Jockey Wheels with some nice silver one's from those very nice people at Hope.
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What you did not use blue ones.
Full SKS chromoplastics re-fitted to the single speed commuter using p-clips etc (one year later thanks again to @dave r who told me it was possible) . Tell you what, using the (lidl) workstand makes things easier.