Jesse, Those tips are at the same angle I use. Especially on skinny elbs where stability might be an issue it actually gets the back of the string inside the back of the bow.
1 1/4" isn't too wide on a bow this long for starters either. Its always much easier to take it off later than vice versa...
I'm glad you are doing this build-a-long, actually its good for me to see someone else do one since everyone has a good idea or two, and you have shown a couple that I like seeing. That curved block is a great idea..
Don't worry or be surprised if the limbs take on more reflex when tillering since it will come out.
I pm'd you about the strings, and I'm glad you did, I didn't even realize this section was here! Fast flight, and Spectra are all I have been using the past few years. 12-14 strands is the norm, and I use 10-8 on my personal bows, and I fatten the serving if I need to..I also use and endless style with very little twists since it gives a bit more speed.
Rich