At this point this is where I would try Super Glue, etc... and then start looking for a replacement Booster on ebay! I found this stuff at WalMart, it said it worked on plastics, I though - "Whatever!"
It works! It has been 24 hours and the repair is strong. The break was at a critical point because it hold the weight of the Defiant:
I plan on getting a piece of sheet styrene at the hobby store and reinforce the bottom of it for added stability. The Quick Grip will work nicely to bond it.
I highly recommend this stuff!! It was easy to work with, it dries clear, can be sanded & painted.
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"It ain't about how hard you hit, but how hard you can get hit, how much you can take and keep moving forward - thats how winning is done!" Rocky Balboa