Pilot Plumix nibs comparison writing in Noodler's Aircorp Blue Black

Pilot Plumix, Penmanship, Kakuno, 78G, Prera and Cocoon/MR (including but not limited to the MR Metropolitan) pens all use the same type of interchangeable, friction-fit steel nibs, so getting a Pilot Enso Plumix hand lettering set means I get three italic nibs (of F, M and B width grades) that will fit into any of the other models. They also fit the PenBBS 494, Pali 013/Wing Sung 3013, and a number of other Chinese fountain pens.

N.B. The CM nib option available for some Pilot Prera and MR models is effectively the same as a Plumix M nib.