Where in the heck does a new daddy and working man get the time to do a 10-hour stint of Guitar Hero?
Man, I can hardly scrape time together to watch a movie these days...
Grissim, my main suggestion is to cut way back or eliminate the handstand training for a while. Next, when you are doing handstands, you very much need to "squeeze" the heck out of the ground with the tips of all of your fingers while trying to keep the base of your index finger in contact with the ground. Loose fingers and wrists are a quick way to injury in handstands.
See if any of the wrist prehab in this thread helps:
Take care of wrist/hand problems early, or end up with potentially chronic issues that affect all of your life activities later (since we humans use our hands for just a *few* things).
Also note that carpal tunnel syndrome-ish symptoms can also originate from the 1st rib / clavicular area or directly from the cervical spine. If you have had any tweaks to either of those areas recently, you might want to find a professional to sort that out.