Flycutting a Saddle

[hemmjo]

Understood, was not meant to be critical, just that we need to be able to work in both.

The funny thing is, Copper Tube Size (CTS) is typically expressed as the ID, which for that tube would be 1 1/2" CTS. Even crazier is that 1 1/2" CTS is not really 1 1/2". It is close but the ID varies, while the OD of CTS tubing remains constant so the fittings will work with all types. The wall thickness varies according to according to type. J, K, L, M.

It is just how things evolve.