Hegel fuse holder

Tweaks rule. My system is so tweaked out it would take pages just to list it all and the crazy part is it works so good I only want more. To get some idea, take what you've done, multiply by a hundred. https://youtu.be/zZcZ6eJoxeE?t=9   This will totally trigger the Film Actors Guilds, if you know what I mean. But whatever. Stuff totally works. 

ECT, PHT, ditto. PPS, TDF, fO.q, Townshend, BDR, it really adds up. Its been a while now since the last round of tweaks adding fO.q tape and Active Shielding to the turntable. That left me slack-jawed for a good long time. Only now beginning to get used to that quantum leap. Just in time for more Townshend Pods for the Herron..... did I mention, tweaks rule? Buwahahaha!

Ok, got the SR Orange in. What's the deal with the grey charcoal looking circle in the middle that they tell you not to remove?

I think I have it in the right way with SR facing left to right when inserted.

I also have a Hegel, and would like to see a video, how to open this little door, without breakin the plastic cap, and al;so to see the correct direction of the "orange fuse" how to install into the fuse holder ?

My Aurender has the same fuse holder thingie. I had a difficult time opening it but the Orange fuse made a significant improvement although it takes over 100 hours to break-in. 
I've a number of Synergistic Research products including cables and resonators. All worthwhile even for a guy with a limited budget like me.