I prefer them needing adapters. I use sealed 510 extensions and 510-to-ego. Just looks better.
I don't mind the 510 to eGo adapter either. Use it with the C8 and Stardust on my Provari, and they work great !!!! Still use the eGos once and awhile too. The adapter(s) also work well with my Omega (though not used much anymore).
Looks like you are the first to get them so you win the duty!