I bought an Ops Core bump initially for my TNVC PVS-14,
but it was undersized due to the sizing standard reset,
so I bought a Lancer a few months ago to upsize. That
helped a lot. Then I found the Midwest IIIa's at Kota
and needed a ballistic for a class so I bought one of
those. After all of that, I bought a deluxe set of the
4D pads. With a combo of the 4D's, and a few of
the original craptastic pads, I was able to make
all 3 helmets way more comfortable. The ballistic
is still heavy, but way better. The Ops Core & the
Lancer, are still light, but again, more better.
Also, I did add an H-Nape harness to my ballistic
and that seems to have helped with it, as well,
but I haven't worn it for an extended period of
time, yet.
Cheat to oversize on the helmet if you are the
edge of the sizing break, and make it up with
the deluxe pads, if needed. But keep in mind
that helmet comfort is very subjective & head
shapes vary widely.
Good luck!