The full rules for installing upgrades in suits of warcaster armour can be found in Gearbooks 1-3.
Squad Transference Link
Mechanikal Warcaster Armour Upgrade
Cost: 300 gc
Effect: While a suit of warcaster armour fitted with a squad-transference link is running its arcane turbine at full steam, a different warcaster can bond to the device. During their activation, that different warcaster may then spend any focus points on this warcaster, who is wearing the suit of warcaster armour fitted with a squad transference link, as though they were their own focus points, as long as both warcasters are within each other’s Control Areas.
Morgan’s Notes: These devices are often installed in the suits of junior warcasters so they can bolster the power of the warcaster serving as their instructor, and are especially popular with mercenary outfits or other units who expect to have to stray far from supply lines, as the device allows them to pool their remaining resources in an efficient and versatile fashion when they start running out of warjacks.
Equally often, if more rarely encountered because of the rarity of the warcasting talent, pairs of senior warcasters outfit both of their suits with these devices and bond to each other’s squad transference links so they can better support each other’s flanks at a moment’s notice when battlefield conditions dictate it.
Power Requirement: 2
Installation: Installing a squad transference link requires two hours of labour followed by a successful INT+Mechanikal Engineering roll against a target number of 14.
Fabrication: The material cost of the squad transference link’s parts is 100 gc. It takes two weeks to construct the device. Fabricating a squad transference link requires the Inscribe Formulae ability as well as a successful INT+Mechanikal Engineering roll against a target number of 14.
Comments welcome, as usual.