I find that Spinfit helped me get a better fit than the tips in the box. Foam tips does a pretty good job too, but I don't like how they emphasize the lows. Don't get the version designed for true wireless as those will be shallow to "spin".
LD_Typethanks OP, i also tried the cp100
do u notice any sound change?
i feel the soundstage is a little bit tighter less airy, voice much closer, bass heavier. In general, it is not better or worse in sounding, just a different experience. But for my fit, it just feel better as it can isolate the noise better.