On 15/05/2021 16:30, jon wrote:
On Sat, 15 May 2021 14:59:16 +0100, Chris Bacon wrote:
There's a vertical split in the top of the nail on my pointing finger.

Treat this similar to a propagating crack, drill a small hole at the
leading edge.

I had thought of running a file across so that it makes an extra
flexible area (stopping before going right through....!).

No, not a rasp or *******. Dead smooth, or nail!