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Tools and Materials for Laser Cutting
Welcome to Laser Cutting
Laser Cutting Class
Nice to see that people are still doing this 35 years later. :)
We used to do that at the Amper near Weng but we only had a wide construction plank. Worked well. Did you ever try it on the piece of Amper that is much more narrow and MUCH faster flowing. We just swam through it and there was no bridge in that area. If you do not know what area I am talking about - go find it. Much faster water flow but the river is narrow and deep there.
For plugs that are too big for the heat shrink to fit over you can use SUGRU as well. You use it like model clay and it turns overnight into flexible and durable plastic.