Marty - I love seeing work like this - top job so far and nice detailed photo's.

The white rubber looks great , but I suggest you use black rubbers up in The Machine so that the back corner blends in much better.

I also used some cable ties on certain rubbers in The Machine to stop the balls getting stuck in there , which can happen sometimes -see here for a guide as to what I did.... http://home.kooee.com.au/brainsnap/flintstones3.htm ......about halfway down the page.