Oh man, I can understand that with the big ears.
I solved this like this:
1.)
Cut off approx. 1mm from an unused eartip.
2.)
This “rubber spacer” is pushed onto the nozzle.
3.)
Put your preferred tip over it.
4.)
vs.:
The sonic advantage that can arise is that the sound stage is very often enlarged. Because I have to solve this on some in-ears 
So two birds with one stone, so to speak.
