Just a tid-bit of advice from a guy that seen this and it does happen...
Careful with any Zip ties - use wide width ones versus small short and thin ones...
The Coax can get crushed, too much tension on the Zip tie and the coax can pinch and ruin the 50 ohm impedance by creating a pinch point that changes the spacing of the outer conductor to inner one, you affect the symmetry of the shield to center geometry if you cause kinks, or tight bends or crush the our braid towards the center by a too tight zip tie...you may have a good antenna - but the coax can reflect it's own internal issues and you'll never see a good SWR from the now pinched and crushed - coax section - its' like a kink in a hose to water your lawn, too tight no water gets thru, even a little kink and the water is restricted but even with that, the outer protective sheath of the hose will fail and eventually that hose will develop a leak at that point.
I've seen this in vehicles even done by the factory that cut into the insulation and cause a major fail short - so even with zips, be careful where you use them and what ties to what - you don't want to have more problems on top of the problems you already have.