Are there any tips on re-cutting tool faces without a jig?

[m_c]

Without a jig, it's not worth it. Even with a jig, you're likely to struggle to get the accuracy required to get all the cutting edges even enough to ensure they all cut equally.

If you are serious, short of building your own home made sharpener (I.e. a Quorn tool & cutter grinder), or buying what will inevitably be a rebuild project in a more industrial cutter grinder, the cheapest option are these - https://www.arceurotrade.co.uk/Catal...rpening-Module