Originally Posted by
Jonathon
About the Vans bracket, I wouldn't worry about the rivets, the screws are probably fine too. There are nonmagnetic alloys of stainless steel, so ferrous and ferromagnetic are not synonymous. If you're worried, Dynon recommends using brass hardware to mount the ADAHRS.
The SV-ADAHRS-200 is not compatible with your AF-4500, so consideration of relative merits here should really be between the quick fix of getting a replacement AFS AHRS for your AF-4500, or going down the more substantial road of upgrading to an AF-5400. If you upgrade to an AF-4500, you should absolutely use the SV-ADAHRS-200. The latter will bring many improvements that will set the aircraft up better for the future, but it will also be a more expensive and involved installation.