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Posted by HeatPro on November 05, 2004 at 17:50:48:
In Reply to: adding air vents posted by Ralph Blaine on November 05, 2004 at 11:53:59:
The casting is a bit thin there. If you can clean the surface well and put fiberglass re-enforced epoxy about 1/4-inch thick on a dime-sized surface, then drill through the strengthened surface, it would have less possibility of cracking and give a material to tap the 1/8-inch pipe thread.