I ordered a bunch of .5" weldless fittings from brewers hardware and my hole punches arrive tomorrow. The thought of possibly ruining my blingmanns with 7/8" holes scares the crap out of me. Any advice before I start?
http://www.brewershardware.com/Weldless-Bulkhead-1-2-MPT-X-1-2-Compression-WLFM12C12.html
http://www.brewershardware.com/Weldless-Bulkhead-1-2-MPT-X-1-2-Compression-WLFM12C12.html