Sturtz, is that a 3 line tank or do you have it T'd?

I did something similar to your zip ties except with rubber bands on my P-51. I used those 3M key hangers/picture hanger type things. Mounted one on each side using medium CA and stretched a thick rubber band across it. Very simple, very sturdy and the tank doesn't move back at all. That's what I had been planning on doing with the VF