Use the "robot arms" and similar bricks for bionicle fingers, it's what I see used the most often in both sets and MOCs,
Sorry, they're not my pictures. There's a thread in the toy forum that has a bunch of them Here you go! http://www.tfw2005.com/boards/transformers-toy-discussion/1000026-platinum-edition-breakout-battle.html And some comparisons with the Takara Rusty Prime http://www.tfw2005.com/boards/transformers-toy-discussion/1000257-comparison-scrapyard-optimus-rusty-optimus.html
Dammit, what part of "stop posting in my visitor messages" don'tcha understand?! :mad (reason I added you to my ignore list is because of that stupid trolling post in the Target credit card hack a few months ago but it got deleted and you got slammed so hard for that comment) Just stop already. Please, for the love of God... just stop.