It all stems from not wanting "add-on" things on handlebars, etc. I think I may be on the spectrum
Matt's excellent console looked like a good place and the volt meter isn't critical so that looked a good spot.
That meant it had to be 2" did and, unless I drilled a hole in the triple clamp, an oil line would not work (have not seen any with side feed)
Happened to look at the Livorsi site (volt meter is that brand and Matt always chooses good stuff) and the electrical gauge with remote sender is what they offer.
Not wedded to that solution hence my query in #105 above.
The sender is designed to be screwed into a marine engine so would have a very easy life on my bike.
I'll post which way I go when I decide