Yes, like it said, I had to modify mine with a cut down 102 ss whip to get the stiffness for highway travel, but at the expensive of more stress on the mag mount and having to add several magnets including 2 more of the 6in magnets (pl145's) on the underside of my van as it has thin sheet metal roof. This coupled with a more forward lean to the antenna and the tip stays straight at speed on the highway and it doesn't seem to bother the swr reading much either when parked. I have spent a lot of time messing with my setup and modding the base section of one of the 3 base loads I have. It helps but like I said it stresses every rhode else. If only I could hard mount an antenna I would be good to go as I already have a Breedlove brass quick disconnect mount from back in the day. Anyway I have since ordered a megawatt 4000. Just curious about them I guess, I like the fact the base and the weight of the base itself is lower than the pl5000, it doesn't handle the power of the 5000 but I am not running 500 watts so I don't mind. Will have to wait until it gets here to see what the deal is, but the megawatt is slightly taller at 2036mm vs 1965 of the pl5000, so roughly 2.67in taller I think, not that that much a difference, but we will see. Will have to do a review of both I guess. I agree the Wilson's are good antenna's, especially the older ones IMO. I wish the sirio whip had the same taper as the wilson whip then all might be good lol. Just want my cake and eat it too right!! God bless and have a great day.