Here the gears and driven axle are in place in the chassis. The muff is reamed out to be a fairly loose push fit so that I can test the assembly. The wheels will eventually be glued in after painting etc. Some time was spent filing more metal off the chassis block so that nothing was catching. I've also countersunk the heads of the fixing screws here to make them as flush as possible to the side frames, not least because they will be behind the front and rear wheels. The crankpins had been glued to the driving wheels with araldite on a previous occasion.

I discovered that the muffs were just the right length as they come to fit for the driving wheels without shortening. The muff for the gear shaft did need shortening as you can see. In fact, this one also needed some attention because I didn't have a suitable stepped one in stock (the metric 14T gear has a different hole diameter than the worm wheel). I simply took a fatter 3.2mm (or is it 1/8"?) one and turned one end to 3mm on the lathe. I cut it down to the right length at the same time (much easier than filing by hand). This is much quicker than the operation of reaming out the hole which I did do by hand (is there a lesson there?).

Here the other wheels are (temporarily) attached to check that the chassis rolls along my test track. All seems to be in order (famous last words). You can see the end of one of the two half stub-axles on the gear shaft. At this point the chassis block still hasn't been cut to length.

Next job will be to shape the coupling rods...