That's exactly how I do it. It takes a little more Amsteel because the bridge is basically doubled.If I were to build an amsteel bridge it would probably be in a whoopie fashion. Could you take the bury all the way back to the end of the bury on the locked Brummel? That would get rid of that little skinny section in the middle of the bridge and lengthen the radius of the tight bend going over the carabiner just a tad.
Remember, when you exit the whoopie bury, make sure you exit on the proper side of the rope...you want the tag end coming out so it will never ride up against your tether carabiner. That way, you will have full travel of your beener along the bridge. If you exit the tag 180 degrees it will be in the way of full travel when you twist to shoot behind you. I hope I explained that clearly.
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