I just got the octovo, and apart from the fantastic design, it is also a pretty good light for the K4, and fits perfectly on the K4 frame. I was thinking of getting a lighted cover, but I think I won't. The octovo also uses an AA battery, which means I can use my rechargeable one.
I wish I could ppost some picks, but my camera is broken. Here an amazon link :
http://www.amazon.com/OCTOVO-Solis--...0915512&sr=1-1