A couple things.
First, I was wondering about finger position during the pushups. I've been trying to keep my fingers straight, spread as far apart as I can, but I seem to be increasing the backward bend of my middle joints of my fingers. Is this a problem? On the worst fingers I'd say it's a good 45 degrees...
Second, In coaches warmup series he includes the fingertip pushup, am I to interpret that to mean he has his athletes do fingertip pushups every day? That seems like a lot of volume for the relatively little bones of the fingers.
Lastly, I've considered claw pushups but I have a tendancy for my middle finger joints to "give out" and straighten under heavy load, both re-inforcing the hypermobility problem i've already mentioned, and loading up the end joints of my fingers.