Although the feat Chameleon Crafting in #349 allows you to create a psionic burning hands stone it does not specify who can use it. Can psions, sorcerers, or the character who created it (since it is not on any psionic class list) activate it?
Also how do people suggest the implementation of psicrowns with magic spells or staffs imbued with psionic powers? Should I let spells in psicrowns cost 2*Spell Level - 1?