I have been toying with this item since the Scotland trip.
The natural seeming place on the left of the cockpit for the TomTom was less than perfect.
It was okay before the handguards were fitted and then on almost full lock to turn right, and you'd be surprised how often you do that, the handguard clashed with the Satnav. Dangerous a few times until I made allowances.
The obvious place is the handlebars, but Döra has 1" bar in the centre and the Ram bracket won't fit.
So enter the Touratech solution. Not cheap. But it looks like it will be effective.