With the saw you can chop up blocks into half slabs...Not that interesting? Well, you can place these half slabs up on their sides...
Just an idea.

[Idea] Electric Saw
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- Official Post
Uhm... Redpower?
You usually got plentiful of the gems (given they don't have any use) and accordingly an electricification of the redpower saw's really isn't necessary.
Not to mention I don't really want to meddle with microblock coding.