Not 100% sure I understand, BUT
1. You can certainly do that- its all a matter of balancing the weights of the larger v smaller safety pins with each other and the chain.
2. Honestly, not sure, as I don't know where the safety pins go at that point- but I may not be understanding you correctly.
My way just works for me ( I can do it in about 5 secs and I can vary it enough to make it different on different days ( although total transparency, I'm lazy and the way I showed is what I do 90% of the time!

).