> >I used to think about making a motorised wobbler or an aerator. But
> >then decided etching upside down with good etchant doesn't need any
> >help really, so I never bothered
> 
> To get a good clean etch you should be gently circulating the etchant

I used to do the opposite. Twirl the floating board. But as the contaminated
etchant sinks it creates its own eddies, so I don't even do that anymore

Man, it's the sweet lazy life being an etcher around here ;-)

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