I have a 2862, was looking at buying a few AP's.
Looking at maybe 910c or 912c devices.

I know the 912c are mesh compatible with my router as it states it in the settings.

I can get the 910c a lot cheaper from someone (new old stock).

Any reason why the 910c are not listed on the router settings?

Has anyone used them with a 2862?

Sorry for all the questions 😂 👍🏽

The VigorAP 910C doesn't support Mesh, so you couldn't use Mesh with the router and those APs. Instead you would need to manually configure things like WDS if the APs are wireless, or the Router based Central AP management if they're cabled.

I have a 903 and it was fine until I went away on holiday, I powered it off for a week and now it's fubar'd. Even factory reset doesn't work properly.