Jax, look at this pic.. (I think originally from DA Aquamaster) - that's how you are supposed to do it.
This (the clip, not the webbing) could be useful in retaining the pull at a proper position - I haven't tried it myself, but I can tell you that the tube will slide up eventually with just zip ties, no matter how much you tighten it up.
Webbing - Dive Gear Express
And also keep in mind it's always an option to go back to the usual configuration until you are actually making dives where you'll see a benefit... it's not like they HAVE to be swapped around.
My problem is I have to pull on it ungodly hard to open it, if the pull comes off at any angle except close to 90 degrees. It's not sticking or anything, it's just a strong spring and the friction of a side pull makes it very hard to overcome the pull needed. I have no problem pulling up at it, so if I can stablize the end so I can find it every time, it'll be fine.