I've got the Herbie pads and they fit in the gong without trimming. You just have to squish them with your fingers a bit to reshape. They work great for me.
I've got both the mighty and nano.
At home I prefer the nano through my FC-187. For me it is more efficient with the material and the clouds it produces really scratch my itch.
But the mighty dry is also pretty great. I occasionally hit it at home but mostly just use it when I'm on the go. My...
I've had an eNano for quite a while and recently got the mighty to replace my solo. I've always loved the nano through water. It's my favorite for flavor and efficiency. I still use it more when I'm home than the mighty. But the mighty is great for a portable and I sometimes even hit it at home...
I've got both with the nano and the 187 is really my favorite of the two. More volume and I like the 'purr' of the matrix perc. Plus the glass is much thicker.
I don't really see much benefit of the second chamber in the D022. It's certainly not a bad piece though. But I definitely prefer the 187.