Thanks Moderator... I was about to send him a PM!
Mark,
I have a hardwired Autocom unit and it is great. I added there accessory that splices into the speaker loom and then I have a switch in the glovebox which I can flick between speakers or audio out to the Autocom. There is no Audio out as standard so you either need an Autocom with a bluetooth module, but as you have found bluetooth can be flaky or you go this spliced into the speakers route.
It does take a while as there is a far bit to dismantle to get at the speakers... but if say you were fitting a sat nav to the Triumph mount you could do this job at the same time