I really like the Vandy Vape Revolver. Its a great single coil RTA in my opinion. The only problem I have with it is a common trait to all the Vandy Vape tanks from my perspective.
That shortcoming is an undersized well for the cotton. This means thinning and possibly shaping the cotton so that it comfortably fits without choking the flow of juice up to the coil.
The air flow on the Revolver is designed in such a way that if your coil is too small, too much air goes around the coil and lessens the flavor. A 3 mm coil is pretty good, but a 3.5 mm coil is much better. To get a 3.5 mm coil to wick properly, takes a lot of thinning and a few cuts at angles to get the cotton to wick properly. Of course all that thinning means less juice getting to the coils quickly.
So I can’t stand when something is wrong and I may be able to change it. I got out the trusty Dremel and with a 1/16" drill bit, proceeded to ever so slightly enlarge the holes for the cotton.
It may not look like much at that scale, but it did increase the size significantly. I now only have to thin the cotton minimally and don’t have to make any precision cuts. I spend a lot less time wicking and the flow of juice to the coil is really good. Below is a before and after picture. I love to tinker lol.