There is no point in me getting an XT as it won’t mount onto my 1600.
I am sure RAM has a solution - looking at
you can't use the same as I use on my RS as you have the extra buttons on the left (R & lamp) but they do something that would go on the clutch or brake reservoir
https://www.ebay.co.uk/itm/191845333826
Certainly something to consider if your Nav 6 dies rather than replacing it with the same old tech.