Thiel Owners

Regarding concrete repair - look for expansive grout at Lowes, etc.

I am confused about expansive grout. everything that I've read says its purpose is to open cracks. can you elaborate in a little further?

Wait burst into flames? What in the hell? You serious @un

Expansive grout is a waterproof cement product with adhesives, designed to expand in a crack to seal it. It may be called foundation crack sealer, wet-stop or similar.
Those original CS7 baffles were portland cement concrete, which continues to shrink over time. (Its first cure cycle is 7 years, when its shrinkage is nearly over.) Grouts add gypsum and/or other expansive masonry ingredients to achieve various controlled expansions. I don't know what exact product Thiel (or the nearby repair shop) used. But a millwright or masonry contractor should point you in the right direction.    Disclaimer: After my time at Thiel

The original Phase Linear amps from the 1970s were nick-named "Flames Linear". We had one. It did.

@thoft, Yes, I’m serious.