Mobile setup is FT8900R and Diamond CR627B tri-band 6m/2m/70cm antenna. Everything works well on all bands. The only band I don't have available is 10m. I know there are a few quad band antennas but I'm not interested in any of them. Way back in my "cough cough" CB days I used a K40 antenna with good success. I would say working Alaska mobile on 4 watts is probably successful. I'm not real thrilled about using either lip mount or mag mount with a K40 now on my new car. I know the antenna works fairly well, but I fear both mounts will damage the paint. Sooo any suggestions on an antenna? I'm not drilling holes in my car so that is simply not an option. The Diamond/Comet trunk lip mounts seem sturdy and I have used them in the past with success.