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There's a video out there on youtube or possibly linked elsewhere here at forum. Let me take a look and try to find it.

Found it while I can still edit. Try here: ...

Additional layer of safety but makes cleaning or repair a bit more difficult. I've read where some people do add "liquid nails" to plugs of guns or board itself. Your call.

I have used the "s" pattern of fusing but have come to like fusing EACH row with its own 30 second foot fuse with an inch or so over hang on one end then running a lead fuse of 30 seconds per foot...

3 inch racks are definately easier to build with 3 inch HDPE guns, no ripping required. Some people use spacers in 3s and some do not. I didn't start using spacers till 4 inch. If I were hand...