harry501501
Headphoneus Supremus
I have found with multiple IEM spiral dots and spinfits of the correct size give the nicest low-end.
I like spiral dots since the bore is larger and it tends to open the soundstage and improve some mid/higher frequencies as well
I feel the Spinfits take away a bit of warmth from the low end, it increases bass resolution but at the price of sounding a wee bit thinner.