I have been vaping for 18 months now and have used most atomizers (and all of the penstyle attys): regular and LR. My favorite, by far, is the Boge Leo. It is becoming increasingly popular and more and more suppliers are carrying the Leo. Although you are not one of them (yet?), Rob, you are the leading supplier of adapters.
You see, the only downside to the Leo is that it is not compatible with anything else. [Of course the same was true of the 510 when it first came out.]
The Leo battery is just fine, but it is the same ~3.4V as all other fat batts. Sometimes I want a more intense vape, such as I would get on a VV mod or even on my 3.7V ProVape-1. Thus my desire for an adapter.
In my case, a 901 batt to Leo atty adapter would be great. Others might want a 510 batt to Leo atty adapter. [There are so few mods with 801 fittings that there is little point in creating an 801 to Leo adapter.]
I don't imagine that this is simply an existing item that you could stock. Someone needs to manufacture it. I expect, however, that (via your interaction with adapter manufacturers/distributors) you might have some influence.
If this is not the appropriate forum to post this request, can you (or others reading this) direct me elsewhere?
Thanks, Rob!