Hi, Recently I just finished installing a Hygain AV-18S vertical and noticed in the manual a section about phasing verticals. Now, I'll be honest and say I don't know much about phasing verticals but having some gain in a desired direction is appealing to me. Has anyone here used phased verticals with any success? I do have a few concerns with it because of the slope in my backyard. For it to be a at least a 1/2 of a wavelength long on 20m, the difference in height of the two antennas would be pretty drastic. Do the verticals have to be equal height when they're phased or does something like height not matter? And how critical is the spacing in wavelengths? And correct me if I'm wrong, the two types of firing arrangements are on the ends and the broadside of the antennas correct? I'm just trying to figure this out in my head before going any further to see if it's even feasible to stick another vertical in my backyard.