Legendary item - Upgradable ability -> Multiple different abilities ?

[eleclipse]

So i'm wondering does the Upgradable ability of a legendary item (mhytic rules) apply even in the istance of adding a different ability to the item?

Let's say adding a "detect magic" on command to a amulet of mighty fist +3?

(if it work i will be like this i guess: 0,5 (0lvl spell)* 1 (caster lvl) *2000 *2(1/m spell) = 2000 * 1,5 (different ability) = 3000 (difference in cost -> 1500 gold)

Thanks in advance for any help.

[Ed Girallon Poe]

It would still be a custom upgrade (and thus subject to GM fiat) but , if allowed, should work that way.

[Shoga]

nope,by the RAW its implied you can't add other abilities that aren't scaleable.

so, adding an enhancement to a +1 to make it +2 is fine but not adding keen or flaming...