so ive been going back and forth on this for a couple weeks now. got a 2019 F-150 and want to set up a decent dual band mobile situation, running a TM-V71A. right now i have one of those cheap magnetic mounts with a diamond NR770H on it and honestly the performance is fine but the magnet slides around on the cab and im worried about paint scratches after a few months of this.

the real question is whether i should just drill for a proper NMO mount on the roof or deal with a lip mount or trunk lid mount instead. i know the roof center is theoretically the best ground plane you can get on a vehicle but im also not thrilled about putting a hole in a relatively new truck. lip mounts i hear can have issues with the ground connection being sketchy depending on the vehicle. anyone done both and have opinions? i do a lot of highway driving so wind loading at speed is also a thing i think about, the mag mount antenna wobbles pretty good above 65 or so.

also open to collinear suggestions if anyone has thoughts on what works well for dual band mobile. currently the NR770H seems decent but i dont really have anything to compare it to.

drilled NMO on the roof is the right answer if you plan to keep the truck a while and actually use the radio seriously. i fought with a lip mount on my old Tacoma for two years and it was always a headache -- the ground connection would get flaky especially after rain got in there and oxidized things, and i was constantly chasing SWR issues that turned out to be the mount. once i finally drilled the cab and put in a Larsen NMO mount with a proper grommet and sealant it was night and day. SWR dropped, receive improved noticeably, and i havent touched it since.

for a 2019 F-150 the roof is a big flat panel so you've got a great ground plane. just make sure you seal it properly when you drill, use a step bit to get a clean hole, and get some self-amalgamating tape over the cable entry inside. the coax routing can be a bit annoying on newer trucks but you can usually get it behind the headliner and down the A pillar without too much grief.

as for antennas, im running a Comet SB7 on UHF and a separate antenna for 2m but thats maybe overkill for most people. the Diamond NR770H you have is genuinely a solid antenna, probably not worth changing that part.

yeah the wobble at highway speed is a real thing with mag mounts and longer antennas, ive snapped a PL-259 connector that way before, not fun to diagnose when you're wondering why receive suddenly went to garbage.

one thing worth considering if you really dont want to drill -- some people have good luck with the hatch/door jamb routing for the coax combined with a gutter mount or bed rail mount depending on what you have. not ideal electrically but better mechanically than a lip mount in my experience. though honestly for a permanent install on a truck you use a lot just bite the bullet and drill. resale value worry is overblown, a clean NMO install is basically invisible and you can always fill it with a rubber plug if you ever sell.