What's a "Maxrad" antenna? The picture shows the standard 1/4 wave VHF Hi Band NMO mount antenna any ham armed with a 3/4" Greeley chassis punch can install. That's a neat and very professional rig installation though but considering the simplicity it's very hard to screw up. Methinks your fears are unfounded since I have seen work just as good done by the average ham in spite of a friend's "Leaning Tower Of Pizza" that has a nasty habit of dumping his 223MHz rig. (;->)