ISboxer is easy as can be for setting up mouse repeater regions. You can resize the click region to any size you desire even down to single buttons. You can have as many mouse regions as you desire so you can get real creative with it. You can even have each region send to a specific window or all.
Not sure exactly what you're trying to do with Jamba but I'm sure there's an easier way out there. I have something similar for my mount button- I just have a small mouse repeater region over my mount button and all my slaves also have the mount button the same as the master.
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