Yes.
Exactly, but with the 14mm bowl (in this case referring to the male joint that goes into the bong) you would need a glass adapter to mate the 14mm male bowl to the 18mm female pipe.
The Couchlog 18mm Glass Bowl, the 14mm Glass Bowl, the standard MP and the Glass MP. The small adapter there is an 18mm to 14mm ground glass reducer.
!8mm bowl fits an 18mm female joint natively; the 14mm bowl needs the reducer to reduce from 18mm to 14mm.
The Mouthpieces are both cut to 18mm; both fit natively (they both also fit 14mm female joints natively, but the all-wood one doesn't always fit all 14mm joints, hence the glass one). In this case the glass mouthpiece will also fit with the reducer as well:
Hah! My pleasure. It's fun to watch people work it out and then dial in and really begin to enjoy it. : )