I went to a local established RV builder, John Marshall...he has a set up that he uses to test the tanks...no balloons required, just air, a low pressure gauge and soap.
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Ryan Allen, CFII
RV7 N612RA, flying since july 2012
E-170/175
RV10 Tail Kit complete, Wings 90%, fuse on order
Acro Sport 2, building
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