Bears an eerie resemblance to VO's fluted 110 triple:
http://store.velo-orange.com/index.p...24x34x48t.html
...and it appears both use the "triplizer" configuration: small ring bolts to middle ring, rather than directly to the crank arm. It probably works fine, until you need to replace the middle ring, which neither VO nor IRD list as a separate item,
AFAIK.
SP
Bend, OR