I repair holes today:
I glued plastic card (0.4mm) on the front of the plane. Left side was too short....
I 'm carving and sanding plastic card, and....It's not good:
I glued an other plastic card (0.15mm):
and an other on (0.15mm)
I sand the "nose" of the plane on a piece of sandpaper layed down flat (?)
I put a little glue (in red) on the angle to consolidate the whole and sand it.
When you push very hard, it's ok.
A+