So. About those tips.
I've been thinking about everything been said in this thread recently.
Tonight I performed some tip rolling, I seem to prefer tips with a thinner wall, I feel this adds a little lift in the tonality which is what the Noble tips also do. I can't use Spiral Dot tips on my Ref.1 because with my ear canals it introduces a treble spike. Not only this, while I completely understand the benefits these tips provide they also make the sound a little over cumbered for me, thick or forceful which leads to early fatigue.
I have found another tip providing some good response.
The ones with little skulls on the side.