Re: Brass shaft loose in brass bushing.
Indeed, since the end-float was cured (by fitting an alternative knob/shaft and associated components) the 1000ohm range now zeroes perfectly and waggling the selector does not cause the needle to shift at all. The side play was not, it seems, a contributory factor.
The variance in avometers of this era (1940's) was apparent as always- both the AC and DC rotary selectors which i rejected were tried in the parts donor meter (a Model 48A) and their diameter was too large to slide into the bush.
It was logical that end-float was the cause of poor contact in the leaf switch, had I thought it through properly in the first place. Interesting discussion though. Thanks all.
Dave
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