Well, there's the Limitation that you take to represent "only change-able at base"; that's about the only rules-related thing you need to do.
In terms of how you handle it in-game, that varies based on character conception and GM preference. Some GMs might want you to prepare a big ol' list of gadgets you have access to, and then pick from it when you return to base. Others might be content to have you say, "My character's got lots of stuff; just about any gadget he needs" and change the VPP as you please whenever you go back to base.
In either case, once you leave the base the VPP is fixed as what you chose to take until you go back to the base and change it again.
Steve Long
Young Curmudgeon
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