Greg,
You live here in the Denver area, don't you? If you want to come take a look at my arches, I'd be happy to show you my setup. I have run pixel strips inside arches of HDPE tubing (24 arches total) for the last 2 seasons, all in LOR (although hopefully for the last time). The physical setup/takedown is far easier than AC channel arches, and I really like the look of them. Getting them configured in LOR can be tedious, but it can definitely be done if you want to stick with LOR.
If it was me, I would update the arch elements of the existing sequences to take advantage of the higher channel count, you get much smoother effects like jnealand said.
I can even send you my sequences to use as a starting point for them if you want.
I'm going to wait for XL4 to come out before starting to pursue my conversion from LOR to XL/NC...
Martin