no worries! i just didn't want to retype all that hahaha.
use what you have; no need to worry just yet. Pumpkin Pie has been on mice since his birth around this past september. 6mo old and switched easily. as long you provide good husbandry and offer just right, on paper it should be no problem. if not, there's many tips and tricks out there.
EDIT: f/t feeders can last ~a year if stored correctly.