Thank you for the replies. It is pretty amazing that changes can get done like this. So far xlights has me wondering what took me so long to learn about this and switch over!
As for the arch size....yah, it's been quite a bit more than I bargained for. I thought I found a material rigid enough but then when I actually got it and did a mock up, it's much more flexible with that length than I thought. It's 2 1/2" opaque poly pipe. It's really a short driveway and only 2 cars wide so what I actually may have to end up doing if I cant get it fairly secure with tie downs to the side is to make an H pattern skeleton out of 3/4" EMT and secure the tops of the arch to that to make it more rigid. In my head, it worked out great. But the reality of switching to xlights, adding a falcon f16, trying to figure out how to make these, learning about power injection......makes me think maybe I should have just started with converting my AC models to pixels first..

but what's the fun of not adding anything or taking on a challenge, right? I have to keep saying that to myself..lol.