Shackleton

I have the rimu side frames and ends of a queen bed free for collection in Remuera if that is of interest to you.

Aliexpress sources a cheaper stainless 304 exhaust mixer here. https://www.aliexpress.com/item/1005006734593303.html The US HDI marine is 316 stainless but more expensive.

This is what I use on my engine and toilet as a descaler. I have no association with this vendor apart from being a satisfied purchaser. https://www.mchem.co.nz/shop/Products/Acids/PHOSPHORIC+ACID+85%+-+5+LITRES.html

This where I got my phosphoric acid from in Auckland. https://www.mchem.co.nz/shop/Products/Acids/PHOSPHORIC+ACID+85%+-+5+LITRES.html#cashsales

For a manual backup I use one of these with success to remove the water in my bilge my electric bilge pump cannot pick up. https://www.smartmarine.co.nz/product/26698/45cm-big-shot-water-gun-bazooka

I have thought about removing my VSR for a FET splitter and using my MPPT charger but how do I keep my MPPT charger ready to sense ? A wire directly to one battery? The following are thoughts from Victron Argofet and MPPT compatibility question - Victron Community (victronenergy.com)

You said "I should add, that my old unit is not strictly speaking a v-drive. It's a parallel system with a 1:1 ratio. Much simpler than the Argo V-Drives." Perhaps then look at a second hand transfer case from a 4x4 vehicle. You will still have your shafts (cardan?) to mount and secure in the hull.

I have used an argo in the past as a replacement remote V drive. See argorace.com.au/product/v-drive.