Jason I commend your efforts. Wish more younger folks had the quest for learning / challenges.
When you take away money and a girlfriend, add some ambition with basic tools things get interesting real quick.
For those interested in more info - the drill method works surprising well. The surface finish is comparable to the big boy methods. We ended up pulling the threads out in the homemade valve taper tool and decided to move on. The relief and plunge cut are easy to do; perfect valve jobs are tougher without the proper tools...
The upgraded equipment includes a .005" taper valve guide pins. The intake works well with a .236" base diameter but the exhaust side needs something slightly larger like a .238" pin. Things are stalled until we get the new pin for the exhaust.
(Jason and I live 3 miles away from each other, we are both building new 99's for 2016, there is a bar halfway between us....come join!)