This rocket is meant t' be kind o' a "Rocket Scrap Yard" build.  It has some Mercury, me hearties, Gemini and Apollo influences.  It's also a modular build.  It has a removable Cargo Bay that can be installed or removed.

T' upper three motor canted cluster utilizes a 24mm motor.  There's a 24mm motor mount in t' fin can, and t' cargo bay too.

Link t' Build Thread: Lakeroadster's Liftin' Rocket | T' Rocketry Forum