The only modification that I've made to my Spec V was to cut a hole in the outflow line coming from the pump. That has kept the water level up higher in the pump chamber, so that my heater is properly submerged. This combined with the flow turned all the way down means that I don't have to sponge off the outflow pipe to reduce the flow.
I will also be blocking the small slit at the bottom, because it bothers me that water is bypassing the filter, and I do plan on adding some shrimp.
I've heard about people cutting slits and holes in the line, so nice that you posted it working. Thanks.