quick, and probably dumb, lol, question.
are PME tubes 0 and 00 to small to work well with buttercream (smbc is what i use)?
The only issue with using such small tips is that your frosting must be smooth, no lumps at all. You can use either medium, but I find that royal works best.
my smbc is very smooth since it is not a PS bc.
would adding something like piping gel be helpful?