Hi Jason Just realised that I mailed this response to the club website help address! Here is what I sent - repeats some of what has been said since your post - apologies..... My DIY headsets work very well in the 'cockpit' and even between cars if one stays close! They connect ok to my phone, but I could not get them to work with my satnav and/or the walkie talkies. Very poor instructions compared to the Sena stuff so difficult to know what they can actually do. But sound quality great. I got my TuffTalks in the UK a while ago - but have also heard that they are not readily available at the moment - although I am pretty sure Alan Reeves had a price from ‘brillbikebitz’ on ebay recently - they are too expensive for what they are though, so I suspect they do not sell well for that reason!? PTT is on the side of the TuffTalk headset if you plug the walkie talkie into the headset. I have not used them like this as I use the Sena SR10 unit which is bluetooth and has its own PTT button and an extension - I fix mine to the handbrake - you still have to take your hand off the steering wheel though! Only used mine with a screen so cannot comment on aero! Going to do a bit of research on Zello to try and understand how that works. Good luck. Garth