TLP Pershing #K046 Build, Part 19, Tunnels, Before and After

The next two posts cover shaping the upper, flat tunnels.

On the left is the fit before sanding the underside contour.
The instructions give dimensions but don't mention fitting it to the body tube.
The inset picture shows the tunnel after sanding the curve. The fit is much better and will require little filling.

Here's another before and after.

Before sanding, the outside edges on the underside get a quick swipe with a Sharpie.
Make the mark fast, you don't want a lot of ink soaking into the balsa and showing through the final paint coats.

The inset picture shows whats left of the ink after sanding the curve.
The black ink (left after sanding) shows if the curve is consistent and straight from top to bottom.