Frames: These (photo 29) are made from 1.5mm brass sheet and are 1 inch in height. The spacers shown are 1/4 inch square brass rod. Note that all the frame spacers are EXACTLY 2.25 inches in length; it does make sure that nothing gets twisted and distorted when all the bolts are tightened up. Some of the spacers have a bracket silver-soldered to them to mount an extra component. Photograph 30 shows the component parts, including the four bushes for the driving axles. The interior and exterior lengths of these determine how much sideways slack will finally end up on the axles. This takes me quite a bit of head-scratching! Must be something wrong with the calipers and micrometer! Can't be me as a pensioner? With the correct spacer fitted on the inside of the driving wheels it is very easy to set up the distance between the wheel flanges. Note the front frame spacer is removable with the front beam (photo 31). These two items can be soft soldered together as a pair. This makes it easy to remove the entire cylinder assembly if needed.
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