Glad to hear your B1 conversion has been successful. I am guessing your axles were the normal 3mm diameter. As for my project, I’m currently stalled. The idea of using the 1/8″ to 2mm sleeves was a non starter as the 2mm hole is a sloppy fit on a 2mm axle. Not surprising really as it’s designed for a freely running axle rather than a push fit. A buddy with a lathe has kindly offered to make some sleeves to fit.