As far asi can tell only Navico units will work with each other. Also I have a Simrad go7 xse which isn’t radar ready, I was planning on getting a bare go7xsr and having the 2, (I wouldn’t have to buy a transducer) but it’s still another £550 on the cost. I’ve got used to the simrad which is keeping my staying with the brand. However I’m also keen on saving money amd I could sell the one I have and switch to garmin.