A very nice pick&place robot !! Give u big big hands ....... 
but I believe, if it can pick something a little bit heavier, i.e. 5lb or 2kg, that will make your robot even more meaningful. Now, it is nice, but ..I cant think of a way to use it, so it is nice and no more than a nice piece of hobby project.
add oil..add oil...just 1 more step, it will be a GREAT robot!!