Dennyleo
All seriousness aside, what vintage P-40 do you have? First batch from a different builder would be about 10-12 years old, had really questionable to BAD leadouts. My Dad's P-40 from that batch failed one leadout without ever being flown. All it had done was been stored RTF hanging from its leadouts. The original batch also had issues with bad leading edge radii (had to cut back covering & sand then recover. The leadout ends had what looked like a 1/4" long shiny silver crimping tube. In the worst cases the leadout cable only went through & back one time. If yours looks like this replace the leadouts before flight.
The more recent batch came from a different source with far better building and with attention to detail in areas like the leadouts. Theses have outstanding woodwork with proper leading edge treatments. The leadout ends are copper tubes with AMA style crimp. These look like they should last a long time...