There are only two types of SRAM Force NDS crank arms -- the "regular" version (shown on the right side of the guide) and the "I-A" version with the shaft attached to the NDS arm (shown on the left side of the guide).

Is the "pin spanner" ring you're talking about actually the extractor bolt retainer? If so, don't mess with it. All you need to get the crank out is an allen wrench that fits the extractor bolt. Loosen the bolt and it should pull the crank arm off. Doesn't matter what kind of BB you have. If that's not making sense then you're probably going to have to post a photo so we can see what you're talking about.