Limiting option instances
 

I swear I used to be able to do this in my sleep. Age catching up...

I want to limit the range of an option depending on roster size.

Say Major Tom can take Stim Kits, with the option range set at 0-10.

In a 500pt roster he can have 1, 1000pts 2, 1500 3, etc

How do I validate this?

Did you found how to do that?
Actually I have the same problem.

Use a private stat and an exclusion linked to the private stat. In the private stat calculate what should the stat be based upon roster size, this then caps the exclusion