Same situation here -- I have a Whip and was using Big Jim's medium size quiver but -- even with only 3 arrows -- it was causing torque whenever I'd shoot and I was missing shots. (Great quiver, though, just too heavy for my needs.)
Strongly considered a side quiver, but I decided to give the EFA 3-arrow quiver a shot before abandoning the idea of a bow quiver on my longbow.
The EFA is very light and doesn't affect my shot. Have been on a few hunting trips so far this year with it and have been very pleased.