Started the week by positioning the pedal rod temporarily, however the pin needed minor fettling, so had to come out again.  This done and with the arrival of the thick washers (which then required machining) I was able to start refitting the brake rods.   The pin on the sliding link to the rear brake is a spring anchor; luckily this one was not worn but does need the split pin hole drilling out, a perilous operation in a small item like this but achieved successfully at the expense of two expendable drill bits.  It then became clear that with the operating cams set as they are currently, the brake rods to the rear axle were not long enough. So to fix this I began the tedious job of removing and resetting the cams, commencing with heating with oxyacetylene the large nut on the end of the O/S shaft .  This seems to have loosened the split pin, but other matters have intervened so the job will not now continue until next week, when the first job will be to properly extract the split pin.