In RAW, items like the Utility Belt and the Backpack simply add to your Encumbrance Threshold. So sometimes you'll end up with players who look like pack mules, and yet suffer no penalties. And sometimes you may end up with a Brawn 4 player wearing a backpack so that they can carry their tricked-out LRB of 10 Encumbrance.
This is intended to be a simple fix to these issues by making the Backpack or whatever have a certain Encumbrance and then a capacity itself of items that don't count to your Encumbrance Threshold.
So, for example:
Backpack: 2 Encumbrance. Can hold a total of 6 Encumbrance worth of items weighing 3 Encumbrance or less, subject to GM discretion,* without contributing to the wearer's total carried Encumbrance.
Utility Belt: 1 Encumbrance. Can hold a total of 2 Encumbrance worth of items weighing 1 Encumbrance or less, subject to GM discretion, without contributing to the wearer's total carried Encumbrance.
Load-Bearing Gear: 1 Encumbrance. Can hold a total of 4 Encumbrance worth of items weighing 2 Encumbrance or less, subject to GM discretion, without contributing to the wearer's total carried Encumbrance.
Under-Barrel Micro-Rocket Rack: 3 Encumbrance. Mounted Micro-Rockets do not contribute to the wielder's total carried Encumbrance.
So, an LRB with an Under-Barrel Micro-Rocket Rack weighs 10 encumbrance. In the base game, someone with 4 Brawn would need a Utility Belt to carry this. Here, they'd need the Burly talent, Repulsor-Assisted Lifting, or an attachment that reduces Encumbrance.
*All that means is that the GM could rule that, for example, a particular Encumbrance 3 item does not make sense, or that an Encumbrance 4 item does.
What do you think?
Here's what I finally went with:
Each item for carrying equipment has an associated Encumbrance value, and allows you to carry a certain amount of Encumbrance without contributing to your carried Encumbrance.
Examples:
Utility Belt:
1 Encumbrance. Can hold 2 Encumbrance worth of items without contributing to the wearer's total carried Encumbrance.
Load-Bearing Gear: 1
Encumbrance. Can hold 4 Encumbrance worth of items without contributing to the wearer's total carried Encumbrance.
Backpack:
2 Encumbrance. Can hold 6 Encumbrance worth of items without contributing to the wearer's total carried Encumbrance.
Imperial Army Military Pack: 3 Encumbrance, Cumbersome 2. Can hold 9 Encumbrance worth of items without contributing to the wearer's total carried Encumbrance.
Military Modular Backpack Storage Unit: 0 Encumbrance. Can hold 3 Encumbrance worth of items without contributing to the wearer's total carried Encumbrance
Under-Barrel Micro-Rocket Rack:
3 Encumbrance. Mounted Micro-Rockets do not contribute to the wielder's total carried Encumbrance.
From here, extrapolation should be quite simple.
Notes:
At GM discretion, certain items may not fit, but the GM should take into account the option of mounting items externally.
To clarify, the listed amount of Encumbrance that can be held by an item is not a hard limit, but rather a measure of how much can be carried before the items' Encumbrance starts to count against the character's Encumbrance Threshold.
Added final version