Due to an unfortunate medical condition that causes numb fingers, I now find myself spending way too long tying flies on tippet, wasting a lot of precious water time on the process. It has occurred to me that I might solve this by tying the flies on a length of tippet in advance and putting a loop knot in the other end. Then I could put flies on my leader with a simple loop-to-loop connection.

Any ideas on this:
1. What is the best loop knot to use for this purpose?
2. How long should that tippet line be with loop and fly?
3. What is the best way to store and carry these flies pre-tied on tippet?

Many thanks in advance for any advice.

Brad