Amateur hour with NMO hole saw and 2016 Silverado

[guttapercha]

OP following up..

I put a Larsen NMO27 with spring on there, and wow - the sheet metal on this Chevy flexes way more than my old Ford did in the same location. Gives me the heebee jeebies.

[W9BU]

You really can't compare sheet metal thicknesses of new cars to old cars. Much has changed in the auto industry. The steel is about the same or better than it was "back then" and the manufacturers are using thinner steels to save weight and cost. I have a 1929 Ford Model A sitting in my garage. I like to thump it's fenders when I walk by it to see just how thick the steel is compared to modern vehicles.

[guttapercha]

Originally Posted by W9BU

You really can't compare sheet metal thicknesses of new cars to old cars. Much has changed in the auto industry. The steel is about the same or better than it was "back then" and the manufacturers are using thinner steels to save weight and cost. I have a 1929 Ford Model A sitting in my garage. I like to thump it's fenders when I walk by it to see just how thick the steel is compared to modern vehicles.

The Ford was only a 2010, so only old in the relative sense. GM..sigh..

[jonwienke]

Originally Posted by W9BU

I did one install on my personal vehicle where I did not drop the headliner. For as long as I owned that vehicle, I could hear the loose coax slapping against the inside of the roof/headliner whenever the vehicle shook. Took me a long time to tune that out. If I had dropped the headliner, I could have taped or otherwise anchored that coax (not with Ty-Wraps) so it wouldn't flop around.

I used zip ties to secure the coax to prevent it from vibrating inside the headliner. Not sure how you can do that without dropping the headliner.