The stepped layers under the base of the nozzle shroud are trimmed off using a single edge razor blade.
This leaves a thick, rough edge.
The edge is hardened for sanding with some CA glue applied with a Q-tip.
On the right is the nozzle after the bottom is sanded flat with 400 grit on a block.
On the top is the single paper layer thickness nozzle from the kit. The nozzle is flimsy and could get bent beyond repair after a single flight.
Below that is my triple thickness replacement. It feels as strong as a molded plastic nozzle. I probably could have got by with two layers of cardstock.
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