As written, the Knük has a +1 ECL, although I think its a lot closer to +2 at the least.....
4 arms
+4 dex
+4 wis
+2 nat armor
Multidexterity(takes no damage penalties for off hand attacks, bit attack still takes penalty)
claw attacks for 1d4 points(primary)
bite attack for 1d6(secondary)
Combined with Multiattack....which is a -2 to all attacks, but he can use all his arms....1st level, flurry for 2 attacks, 3 extra arms, 1 bite......thats 6 attacks at first level...but all will be at a -4 penalty (-2 flurry, -2 multiattack)
Am i right on this?