A small correction . . . when I said I don't use masking tape, I meant during assembly.
I do use it when cutting.

I'm guessing your Summit imported hose comment is right on.

I tried to use some Russel hose about 12 years back.
Crappy stuff and it went into the trash and onto my, "never buy that stuff again...."

I've done well with both Earl's and Aeroquip hose and fittings.