Brian;
The speed of the motor is a preferance. I started with a cardboard box with notches and and egg timer, turned the rod every 15 minutes 180 degrees.
Size "A" has been my choice of threads
Color preserver is another personal choice. Practice wraps on a fiberglass arrow shaft and coat them with and without and see what happens when you apply the epoxy.
Yes wrap the ferrels.
Emersing the pieces in boiling water will soften the epoxy so you can take them abart.
The wraps will hold the check in place as you can manupliate them with your thumbnails.