Complex Excel financial modelling- strong ability with fixing circular date math

Need an extremely competent financial modeler in Excel who is capable of working with a lot of date math in formulas. You need to work on a working model template.

NOTE: Do not apply if you are not genuinely capable of working with complex models. I am looking for help because I'm busy, not because I'm not capable!

I make huge financial model templates on topics people don't model. I made a model on "ESOP" (Ownership structures for startups).

ISSUE
A client input dates in a way I didn't test and I realized I built in circular references I wasn't aware of.

TASK
Remove circular references (Need to change logic a bit to do it, which is not simple)
Ideally break test to see how I messed up date math when dates are similar so won't be issues with input assumptions

APPLICATION
Apply with 2 sentences max to show you are a supermodel nerd
We message
I share model with you and discuss to check you can do

NOTE
This is HARD financial modeling but fun if you are a nerd. I'm just busy working on myself, so if I can find someone good enough then I don't have to put off fixing. I don't expect to find someone capable though.
If you can help me, you can work on other things I have (Upside is you get to work on hard modeling as I'm very good)