Momentum
The TN you will be rolling against will always be your ability and skill (piloting could be Conn + Helm Operations for example), so you already know that. The difficulty of the task will be set by me though, so I'll probably ask you to do a task of difficulty x (where x is 0-5). As I understand it tasks of difficulty 3 or higher are hard to make without using momentum, determination etc. When it comes to checks you ask if you can make, it makes it a bit harder to do, as you don't know the difficulty, and you have to choose "purchase dice" before you roll. One thing we could do if you want to make a roll, is that you could say that you'll roll additional dice if it is harder than some threshold. For example:
OOC:
O'Brian will try to fix the warp core. I'll assume this is an easy task (difficulty 1) and just roll my 2d20. If it's a harder task, I'll use a momentum to get a new dice though. **rolls 3d20, ignore last if it's of difficulty 1 or lower**
Determination
The first adventure looks to be a 1-session adventure as I see it, so I think we'll refresh determination on adventures. If an adventure looks to be longer than what I think a 1-session adventure should be, I'll give you a refresh at a point that looks suitable. Does that sound good to you?
As a side note, should we make a resource tracking thread for tracking momentum, determination etc? Since the momentum pool is common for all of you it might make sense to have a pool?