I decided to go with a separate GMRS unit install instead of just accessing GMRS using my VHF/UHF (why. . . well, there is this "it's the law" thing that is nagging at the back of my mind). This means installing another antenna on my FJ Cruiser. This is enough antennas to push me over the line, drop the headliner and install NMO mounts instead of the "clamp-On" that I am currently using. This got me to looking at the Larson NMO tunable, a favourite when I was playing with radios more often. Realizing how short the wavelength is, has anyone played with different lengths? The "no ground plane" feature of half-wave is pointless as it is going to go on a big sheet of steel (the roof). The bit of gain is more valuable to me. I then got to thinking of full-wave, I can't think of anyone I know ever using full-wave, there has to be a good reason not to, but I am not thinking of any. There is the point that going full-wave gives very little gain over half-wave. . . The antenna comes pretty long, with the intention of being cut, but it can't be un-cut. Any thoughts?