Exhaust Smell Leak Solved with Homemade Smoke Machine

Setup:  86 Porsche 944 Turbo / LS3 / 3" pipe to single pipe all the way back connected with Lap Band Exhaust Connectors.

Problem:  Exhaust smell in cabin when stopped

Troubleshooting:  Created a homemade smoke machine as found here:
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I created this smoke machine and just put the outlet up the tailpipe with a bunch of rags.  After less than a minute..............I found my problem or problem(s) which is what I am sharing.  
As I looked under the car with a flashlight for easier smoke identification, I found every single one of my lap band 3" exhaust pipe connectors had small leaks where the bolts are used.  Since I used about 6 of these to put my exhaust together to stay away from the having to pay to get my exhaust done, there were too many combined leaks which created a smell in the cabin.  

SOLUTION:  I am taking this to an exhaust shop to have all my connections TIG Welded.  
***********  JUST SAVING OTHERS THE TROUBLE OF USING LAP BAND CONNECTORS *******