So far Ivd found that geekvape Tsunami 24 comes with a regular 510 pin and an extra hollow 510 pin for bottom feeding.
The Tobecca Velocity clone may have the extra bottom feed pin also.Depends on the seller I've found,so be sure to read description.
I'm assuming if the RBA has removable 510 pin it can be replaced with a hollow bottom feed pin,but can't say with 100% accuracy.
There are bottom feed rda,such as Loki labs Odin,rio grand rda,and others but they may not have removable 510 hollow pins.
If you know of some rda that will do either please list.
The Tobecca Velocity clone may have the extra bottom feed pin also.Depends on the seller I've found,so be sure to read description.
I'm assuming if the RBA has removable 510 pin it can be replaced with a hollow bottom feed pin,but can't say with 100% accuracy.
There are bottom feed rda,such as Loki labs Odin,rio grand rda,and others but they may not have removable 510 hollow pins.
If you know of some rda that will do either please list.