I was going to mount a cb antenna on my toolbox, but I’ve decided to just use a scanner instead. My question is, how critical is the ground plane for a scanner antenna? I have a steel gull wing toolbox, so I have a nice square steel plate in the middle. My plan is to mount a Larsen Tri band antenna on an nmo mount in the center of the box. Will this work satisfactory? I know the roof is the ideal place, and I may end up doing a roof mount. But the toolbox mount would give me better clearance for tree limbs and the like.