Microchipping concerns

I'm such a bleeding heart...

Today I made an appointment for Thursday to microchip Kappa, and now I'm second guessing myself - y'all aren't necessarily bird experts reading this journal, but most of you are rational enough to do a good cost-benefit analysis, and that's what I'm looking for here. When I look at something that's possibly risky, I look at the chance of something bad happening, the potential consequences if that bad thing does happen, and the (usually guaranteed) ongoing benefits of taking the action. Sometimes there's additional ongoing costs other than just one big bad thing happening. In this specific case, it's not quite so simple - it's more a matter of there being a chance of bad things happening w/o the chip, and with the chip there's a chance of additional bad things happening, but a chance of ameliorating the bad things that'd happen w/o the chip, and a bit of one-time guaranteed cost.

( lots more detail )

So, what's your analysis? If you do happen to have experience with microchips and small pets, I'd be interested to hear that too.

And just so this post isn't all my freaking out, ( a few photos, a couple of which I've posted elsewhere as well. )

X-posted a couple places