I’ve got the ML hop unit. I have a maple leaf barrel.
It didn’t fit. And I was somewhat fucked off.
There is a c clip, which fits into the grooves in the barrel and the hop chamber.
without the grooves (which my barrel doesn’t have), it doesn’t fit.
So nope, not marketing, sadly.
The hop unit looks to be well made (in the second version), but I couldn’t tell you how well it works yet lol.