Am I using aerofinsim lite correctly?

[Iamtannorv]

So, in the process of scratching my "I wanna do rocket stuff" itch, while waiting for my wildman blackhawk 38 to arrive, I pulled up the rocksim file to get some fin specs, and ran them through AeroFinSimLite, and it gave me a flutter velocity of approx mach 1.75 and divergence velocity of mach 1.81 at 3k ft ASL. I wanted to really push this rocket on some insane flights after a couple tamer low and slow shakedown flights, so I wanted to check flutter velocity etc to know if I should be T2T glassing it or not.
These are all the settings I am using for the program, just wanted someone more experienced with the program to double check my work and make sure i'm doing this right. I am using NACA TN 4197 for the CN-alpha method, as both the classical and barrowman method gave me a flutter velocity higher than my divergence velocity, which seemed inaccurate.

 

[Buckeye]

Can't help you on FinSim, but I have flown my BH38 on a few 6XL motors (to maybe M1.5, iirc) with just good RocketPoxy fillets. I don't think T2T is required. These fins are tough.