Hello Jerry, funny, I did quite similar spreadsheet two days ago. You may check it here.. I am already sure I was wrong in few of my calculations but generally I guess I understand the principle of steem power and voting power. I started with this math because I got idea to create autonomous bot called Tree Planter. I have already met on steemit.chat super great guy who offer me to develop the bot. Thanks a lot @personz. She (the bot) has already applied for registration to steemit waiting for approval. It means very soon we will need SP. Much. We are looking for investors either you delegate SP to the bot wallet for one year therefor we will be able to plant the same amount of trees to restore the forest and you get 100% of your SP back or you just make it as one year investment and we will return your steem power plus 10% interest without tree planting. I hope you do not mind this type of public offer, but your post forced me to start with it. Let me introduce you Water for Cameroon - Tree Planter Voting Bot; Plant trees and get paid for it!. Thank you plenty for your support.