Well I've gone and done it.
I've never installed a pickup system in a guitar, but that has been the plan all along for the new D1A.
I read everything I could get my hands on and watched all the videos I could find. Today I installed the LR Baggs Anthem system in my new Collings. I could do it in half the time now. You've just got to be slow and deliberate. The process involves drilling a 1/2" hole for the transducer at the endpin (I had Collings drill that one, but had to enlarge it just a few thousandths with my Dremel), and a 3/32" hole in the corner of the saddle slot to accommodate the under saddle (that was the most nerve racking part). The saddle slot was .100" wide and the bit required was .093", so I taped off the sides of the slot and drilled away. It would be easy to nick the slot edge drilling that one and have a round, ugly indentation next to your saddle in the bridge. Tone doesn't sound like it is adversely effected by the under saddle at all. So the Anthem has two pickups, a microphone that attaches (sticks with adhesive) under the bridge plate, and a piezo under the saddle. Then on the preamp, there is a "mixing" adjustment that allows you to throttle either pickup and get the sound you really want.
Now to get in there and play with the "phase" and the mixer.
Don't be afraid to do these things yourself, like string changes, doing these tasks on your own guitar will familiarize you with the guitar. A bonding moment.
West