Classic & Vintage - I could use some advice on a crack in this fame

This is a custom built frame by Skip Hujsak. Columbus EL. I know this bike has been used hard, but don't know it's complete history. I have been watching this crack spread over time, hoping it was thick bad paint. I don't know any frame builders but an LBS recommended one to me. I plan to take it by another LBS I trust with high end older bikes to get his advice.

Should I go ahead and expose the braze? (seems like there is no chance it's not structural)

Are there any tricks to a Columbus EL frame that I should be cautious about letting a builder that I basically know nothing about work on it?

Any suggestions?

http://www.mmaygraphics.com/Transfer3/Hujsak-damage2.jpg

http://www.mmaygraphics.com/Transfer3/Hujsak-damage4.jpg

Were it my bike I'd want to see what's under the paint at the joint.

stop riding it before it puts you in the hospital. Once the TT lets go, the DT will follow very shortly

Doesn't look like there is anything particularly special about the tubing

Thanks - It's parked till it's fixed.

Looks as if the tube was mitered incorrectly, which created larger gaps than typical between joints, allowing the brass to flex (and crack).

-Kurt

That is a do not pass go kind of crack... parked until fixed is the only way to go.