Henrix said:
Speaking only as if I were the DM, I would hardly allow any item to give a bonus to use magic/psionic* device. Perhaps something that aided the user to, say, simulate a certain class or something.
Why not? It's a skill, powered by intellect, just like any other. A competence bonus fully falls into the category of a bonus that can be applied to
any skill.
Henrix said:
Open Locks/Disable Device. I think I would like the maker of the item (which I think would have to be a set of Thieve's Tools) to have the skill(s) in question.
And limit the bonus to, oh, I don't know really, one-third the ranks he has in the skill.
I agree that the creator may need to have the skill in question, but I won't apply that to all types of magic items. If you do, you need to rework all of the potions in the DMG that grant skill bonuses. As far as limiting the bonus to one-third the ranks the creator has in the skill, once again, you need to go back and completely rework and recalcuate the costs and requirements and prereqs of several magic items in the DMG. Have fun with that.
Henrix said:
* If you're not using the "Psionics is different" rule, are these not the same? As magic and psionic are interchangeable by default?
They are not interchangeable. A non-psionic does not have any access what-so-ever to the Use Psionic Device skill. If you use psionics in the FRCS, the book states that you
do not use the psionics is different rule, as the FRCS was designed to allow both of them to exist and function in the same campaign setting. Psionics changes quite a bit when used in FRCS, as it begins to function nearly identical to magic in a few ways. For instance, in the FRCS, psionics can be used to counterspell magic, and neither magic nor psionics will function in an antimagic or dead magic zone.
Either way, a psionic and a spellcaster can both use a magic item that grants a bonus to Intuit Direction, or any other skill that is commonly available to any class. Use Magic Device and Use Psionic Device are exclusive skills and not similar in any way.