Right, I have moved in a different direction.

As a more general rule I have thought up this, which is slightly more «narrative»: when buying weapons normally, you could randomly decide what make it is (a Dx roll on a list of manufacturers or GM decides randomly). If a certain make is sought, or required, increase rarity at least by 1 and add at least 10% to the cost. Make does not in any way change the base stats of the weapon - unless a triumph is rolled on the negotiate, which can grant the advanced template (see below).

As a general rule, when buying an attachment from a known manufacturer, i.e. from the same manufactuer that made your weapon, increase rarity by 1-2, cost by 10-20%, but reduce HP requirement by 1.

Furthermore, at GM's discretion, one modification option can be increased, or a drawback that come swith the basic modification can be removed. This should further increase rarity and price by at least 1 and 10% respectively: this could - should perhaps - also replace the HP reduction above.

The only exception to this rule, would be the advanced and prototype templates.
The prototype template: Multiply price by 5 or add 1,000 credits (whichever is higher). Double or add 5 to rarity (whichever is higher); this can of course further change the price. Two characteristics of the weapon, armour or gear can be changed favourably, or a new quality can be added (except the superior weapon quality). This weapon also produces 1 advantage automatically, unless netting more threats, at which point 1 more threat is produced - due to the unstable nature of prototype weaponry and gear.
The advanced template: Double price or add 1,000 (whichever is lower). Double or add 5 to rarity (whichever is lower); this can of course further change the price. One characteristic of the weapon, armour or gear can be changed favouably, or a new quality can be added (except the superior weapon quality).

The prototype template changes can increase or decrease one characteristics up to 50%, the other 25%.
The advanced template changes can increase or decrease one characteristics up to 50%.
Limitations: Range can only be increased one band for ranged weapons, melee weapons cannot increase its range. Critical cannot be decreased lower than 1. Always round reduced values up, increased values round down.
 

Thoughts? Suggestions?

Right, I've been updating my rpg blog/website - which you can find a link to in my signature.

I will be posting further updates on the catalogue and the up-coming Known Threats document on that site from now on. Already some work has been posted.

Find my site here.