DP / Flex Help!

[NPRIVITOR]

Thank you all that answered my previous post regarding the Flex/DP. I've looked through all the previous posts and still have one additional question. My brother was certainly correct that you guys have the info and I certainly appreciate you taking the time to respond. I plan on using this scenario in the State Playoffs this year and need some input as to its validity.

Line Up Card
Num Name Pos
1 Angie 1
2 Barbie 2
3 Casey 8
4 Darla DP
5..9 ...
10 Julie (Flex) 3

At the start of the first inning, Darla (DP) goes in on defense and plays for Casey. Throughout the entire game, Casey actually stays on the bench for Defense but bats on Offense. I do this so that I have a fast running Flex tied to my DP. Had Darla not been a DP since she's not a pitcher or catcher, the only way I can put a fast runner in the game for her when she gets on base is to substitute. I don't have any other speed other than my Flex who I need on Defense only.

So when we come up on offense, Angie hits a single and gets on base. I immediately bring my Flex in to run for her. Julie is still my Flex and has not left game. I do this throughout the game with Angie and Julie. Angie hits 3 times and gets on base, Julie runs 3 times for her.

Do you guys see anything wrong with playing in this manner? On a previous post someone made a great example of considering the "bench" as a defensive position when playing with a Flex.

Thanks again!