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Step 11Sealing the whole lot in!
Take your black card and your perspex sheet which should be the exact size of the inner lip of your box. The lid should close with the sheet in place.
Lay your perspex over the card and with a sharp scalpel cut around it. You should now have a piece of black card the same size as your perspex!
Taking a smaller rectangular shape (in my case a cutting mat) and have a look at where your tubes are in the box. Cut a smaller rectangle out of the card, this is where you will expose your PCB so it is best that the cut out is central to both tubes.
Tape the card down around your cut out edges so the card doesnt sag in the box.
Lay your perspex over the card and with a sharp scalpel cut around it. You should now have a piece of black card the same size as your perspex!
Taking a smaller rectangular shape (in my case a cutting mat) and have a look at where your tubes are in the box. Cut a smaller rectangle out of the card, this is where you will expose your PCB so it is best that the cut out is central to both tubes.
Tape the card down around your cut out edges so the card doesnt sag in the box.
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