Large Prime - responding to yer PM this way ,,,
Let's say you are a level 6 Psi-Arty,
and you have Linked Power metapsi,
and you have a Level 1 psi-item of X,
and you wanna use the level (psi-) Arty ability.
What happens ??
The "spell" level extra cost for using Metamagic X,
costs 1 for 1, level for level
via the normal Artificer cost.
The "spell" level for a Linked Power is the total ML.
Divide by 2, to make the slots line up.
{ ... minor grumbles about not having the book, for the exact wording here ... }
The cost incurred by the Item,
is only equal to the extra ML cost,
of whatever "spell" you use the Linked Power with.
Obviously I'm not very eloquent about how this works.
But a 2nd level Power ("spell")
normally costs 2*3*X, on top of the 1st level power it's Linked to
normally
The Psi-Arty makes this cost: 1 *3*X
It's a minor biff in the Psionic-XX programming.
And makes higher level Powers very cheap.
The small pile of feats that a normal Arty uses to discount Spells,
is accomplished by just the One feat for Psi-Artys,
but works only with Dorjes, instead.