Maybe we can organize something
I heard the mainline before.
I find the HD800 + Crack to grate my eardrums. The treble is borderline bearable even with a good cable on the HD800 like a Norne Draug. I couldn't listen to it for more than 15-20 mins.
HD800 + Mainline is an entirely different story. The treble is extended but ridiculously smooth. Just sounds very nice and natural.
I have a T1 and it sounds amazing with the Crack but I am now curious as to how much better it will be with the Mainline. I've tried Lachlan's setup before and it sounded VERY good. The bass went lower than I remember the Crack doing and of course, silky smooth but detailed sound. I might have to try another time before taking the plunge but I had great memories of it.
What headphones do you have?