Let's not let this get our of hand, guys. ;-)
Every 801 or 901 -> 510 adapter I own (and I own quite a few) works perfectly with 510 cartos, it's just a few 'native' 510 adapters (like the ones on my Prodigy V1 and V2, for example) that don't fit the 510 cartomizers.
So, you'll probably be...