[Nordlondr Folk] Stonecunning?

[mirtexxan]

I'm reading Nordlondr Folk, and the racial "gifts" are very nice.
However, I'm wondering. How are some of the abilities priced? In particular

Stonecunning [26]. At a glance, the dvergr with Stonecunning can tell what materials were used in the construction of a stone building (or what kind of rock surrounds him in a cave), its dimensions, and whether there are any natural weak points, hidden doors, or secret passages. This application of Stonecunning doesn’t require a roll—it’s automatic for any natural or artificial stonework the dvergr can see. With a Concentrate maneuver and a roll against IQ (or Hidden Lore (Lost Civilizations), Traps, or Prospecting if those skills would be appropriate and are higher), they can automatically detect any traps, valuable ores, or other features in stonework that they can see; this also lets them know details like how old it is and who built it, unless that knowledge is truly lost to time.

It seems to be some variation of Detect (stonework) [10?], maybe with Analyzing+100%, Reflexive+40%, and Reliable 4, Reflexive Only (+16%)? Am I correct?

EDIT: A much better implementation:
Detect (Stonework, Common), Analyzing +100%, Analysis only -50%, Vision-Based, Reversed -20%. [26]

Rationale: Stonework (in particular if also including natural caves) is certainly common in DF. Stonecunning as described in the NFolk book does not give the capability of locating something on its own, so Analysis only is the way to go. And given that the dwarf is limited on what he can actually see, Vision-Based to top it off at exactly 26 points (without vision-based a dwarf with the trait could in theory analyze something he simply knows it's there somewhere, using any other sense. This is borderline double-dipping with Analysis only, but still XD)