If I were to not use the wooden blocks, the metal would be fiberglassed right to the grill block by laying fiberglass material over the flanges and putting resin over it all. I am leaning toward the wood though. Its just more adjustable/easier and the wood blocks can also be used as guides to go between the grill slats and help line things up. At some point in this whole process the grill block did warp some and doesn't exactly line up as well as it once did. I'm not sure when this happened. It still bends into place just fine, but it does need to be bent a little, it doesn't just sit right in.
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