It sounds to me that you do many things the same in your country as in ours. Actually, I've learned alot from reading the post from people in other contries.
For every country new things have been learned in beekeeping. It looks almost to me though, that American farming (including beekeeping) has changed LESS in America than other countries. Old men are the same ewerywhere - stubborn. But it seems even many of the young farmers don't want to change the way "dad always did it". Do you have that saying there? "If it works, why change it?" BUT, I think there has been more advancement in beekeeping in other countries than America.
An entrance feeder (click here)
is really easy to make. All you need is three small pieces of wood, and a glass jar with a metal screw on lid. They go right at the entrance (without your entrance reducer, or make a modified entrance reducer to give the space).