You can trim the "pockets" of the strap for a better fit. I find it makes a big difference.
The modified V7 is not a bad candidate at all. I still wonder, why did the factories stay away from the case back gasket as found on the v3.5, which looks more like the gasket on the ROO chronos?
Then again, which gasket is more gen like? Not thread-jacking, just adding to this one. The water resistance is imperative if you're getting into a project like this. You NEED to ensure that after all of the mods, you can still get it wet, or you will have some issues wearing it out in public.
E