I would seriously discourage anyone from using entrance feeders - they have a well-earned reputation for setting-off robbing - which is just what you don't need having made a small colony.
Myself, I use inverted jar feeders ('cause they cost nothing in materials and take only seconds to make), and live with the need to have boxes to house them - which most folk call Feeder Shells. Every hive has one, even the nucs - and they double as housings for overhead insulation, which again - all my hives are fitted with as a matter of course.
I have tried other feeder designs over the years, but found that they are either too complex and time-consuming to make, or will drown bees ... or both.
LJ