I bought the Secdem to check for Tobinator compatibility. That is now done (and successful) so I dont need it any more.
It worked well on the bike but I prefer the look of the original. The Secdem screen worked well with the Tobes. Without, it was too low for me and there were some low frequency reverb type noises which were quite intrusive, but these went when the screen was leant back further and raised a bit with the Tobes.
I was running without earplugs by the way to sense the airflow better.
Andy