don't worry about it, the lenth of the hose will be the major restriction,
from my fluid mechanics days i remember the length of an orifice has as much effect on flow as the diameter, so a 1/4 spigot and inch or so long will only restrict as much as a foot of 3/8 orifice(being the hose)
You can get a lot of fuel through a 1/4 hole! more than most engines need, apart from maybe a pair of 3.6v8 2 stroke johnson 250s!!