I've got two 9v laying down in my Warmoth cavity- and there is enough room (i think) for a carefully placed BTC along with two vol and a tone knob; as long as a 3/4 - 7/8" side jack is drilled. But it fits with room. I think You'll be fine but you might need to remove some of the washers to extend the knobs like Mr. Friedland did http://www.youtube.com/watch?v=r3-uPgqcHuo
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"But lay up for yourselves treasures in heaven, where neither moth nor rust doth corrupt, and where thieves do not break through nor steal:" Matthew 6:20
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