hmm... I can't recall why I didn't use the stock tips earlier. Just did A/B testing, think I am hearing more details from stock tips, definitely better bass and it is louder also; W1 is softer and more sticky. I will use the stock ones for some days. Thank you so much.

I had been using Spinfits W1 on s12 pro, and now continue using it on mk3; the mk3 fits and seals so well compared to s12 pro; like night and day (it was a wow when I go back and wear s12 pro). I also have ie200 but never like the fit though it is very small. Do you guys have any eartips...

My first kilobuck iem, bought it after reading this thread; did A/B testing and I think mk3's soundstage is as wide as my HD650 - I am quite impressed; coming from s12, mk3 is so smooth and musical, bass is not as fast as s12 though.