Sounds like Your blade buying days are over ! Stickin' it to the MAN !
I just love when You need a step washer, You gotta buy all the screws, etc. that goes with it. Actually, it's not that big a deal, but buying blades is, if You collect all I've broken, it would fill a small box.
Anyway, this adds to the theory that this heli COULD have been manufactured easily with folding blades, like My little Walkera 5 #5. Still on the first set of blades on that one.
I think You gave Your beautiful little heli a go around pretty thorough. I think the pitch adjustment is an interesting variable; as one of the reasons for getting the grips I did, was so I could buy the XTREME blades (which I'm sure You could fit onto Yours) as they are supposed to provide so much more lift. I concur with that, definately, and quieter.
I added 8.4 Grams onto my heli with the grips I purchased; that's pretty significant, but I'm running stock motors and even with stock battery, it does pretty good. With the more powerful ones, You don't know a difference in weight at all; it feels light as a feather and I have heeded Jeff's observation that for Outdoor flying, having a heli a little over stock weight isn't such a bad thing.
I absolutely love Your idea, but being a scale model builder in the past, I kinda need to see aluminum and realism, you know? It's pure Vanity, on My part. That, and I didn't think of making one !

I even thought the aluminum grips looked a bit shiny, so I dirtied it up with thinned flat black paint and let it run in crevices and such to give it a more realistic look.
With Your tried and true modification, it will benefit All and I think it would be nice addition in Your Famous adjustments and modification form, that is, with no doubt, the most sought after and printed form on the Web on a CX-2.