For me the worst problem with tips like the sensorcom or star tips it's that they tend to come out from the nozzle but both sound really good, I also agree with Moon that soundstage tend to be closer when the diameter of the tip is smaller than the nozzle.
The best sq tips I've found in my mega tour are the earportz pro guard in L but the crappy isolation make me come back to the mh1c tips which provide me the best fit+isolation+sq
Why do you give up to use your earmolds ?
Oh, it's perhaps not the good thread, but Piotr told me he could do reshell in acrylic, that would be perfect for the FA4 instead of the silicon. For instance I have to give up that idea because I'm weak, very weak... I've bought a Sony ZX1 to pair with my lovely EM32, but maybe later.