This finally leads me to how to mount FLARM antennas. Often FLARM antennas are mounted onto the glare screen. But two FLARM antenna coaxes would definitely be stong enoght to tether the canopy, back to bad again. An optional placement of the antenna would be below, but not attached to, the glare screen. However this might impact coverage.

What are your wise opinions?

As Guy suggests, if your Std Cirrus is anything like ours (#446) there is no carbon anywhere, so all of our antennas (GPS, FLARM, transponder) are mounted underneath the glare shield. GPS patch antennas are simply strapped on top of convenient instrument cases, the FLARM antennas have a quick and dirty plywood mount that is attached to the rear of the transponder (the deepest of the instrument cases), if I remember correctly. All work fine.

Marc