The Did Shorty is nice on a smaller mod, like the mini-pro, for instance. It's just slightly smaller, so that it's not as "top heavy" on the mod. The mini is even smaller, it's for the eGo type size mods. I have only used the regular DiD so far, but will eventually own a few of each size.
If you have a nice sized mod, would start out with the regular size and then at a later time purchase the shorty kit. (shorter center post, smaller cap).
You'll love it! It's one of the few attys out there that puts a "heavenly" smile on the reviewer's faces as and after they take a vape. It's ThaT good in both vapor and flavor. and it's tops on wicking the juice. Hardly ever a dry hit.
Good decision!
(he ships once a week. It takes 2-3 days to hit NY. Customs then holds it for about 5 or more days. Once it's released it will probably arrive at your place before the tracking kicks back in. Unless you go the alternate more expensive way, then it hits your door 2-3 days after he ships it via Fedex or UPS).
Congrats!!! You're going to love it!