I will say for this you have ~1hr before the trade-off happens. You could make up to a 6 Complexity Gadget.
So pick a Complexity from 3-6. Explain what you want to build. Then roll Technology roll vs your Complexity.
Gadgets!
Step 1: Assign Complexity. Assign the Gadget a Complexity of anywhere from 3 to your Technology rank. A gadget’s Complexity determines how powerful it will be and how hard it will be to create.
Step 2: The Challenge Roll. Make a Technology roll using the gadget’s Complexity as the threshold. If successful, you build the Gadget. See step 3. If you succeed by only 1 or 2 points, the gadget will have some unique flaw, quirk, or side-effect, the nature of which is entirely up to the GM.
Step 3: Build the Gadget. If you make the roll, you gain a number of Hero Points equal to double the item’s Complexity to buy Abilities, Talents, and Powers that represent your new Gadget. By default, all Gadgets have the Item Con. You get no extra points for that. However, you can give your Gadget any other Pros and Cons you wish. Optionally, you can also use these Hero Points to modify mundane gear as discussed above —
in effect, the Gadget represents your special modifications. Whether or not you succeed, creating a Gadget takes one scene that lasts about 10 minutes times the item’s Complexity. Gadgets are inherently unstable and often temperamental. Roll one die each time you use one. When you roll less than the number of times you’ve used it, the Gadget stops working. The maximum number of Gadgets you can create per issue equals
half your Intellect.