Season's greetings, I trust everyone had a good Christmas!

I am looking at lapping plates, and though I know the DMT plates are standard, they are also pricy. I guess others could work, right? Has anyone tried this one:

https://www.amazon.co.uk/dp/B015JMIP...v_ov_lig_dp_it

It isn't the cheapest, so I would expect decent quality. I'm thinking that the 400 shouldn't be too far off the DMT 325, and that the 1000 side is not only useful for stones, but maybe also if I need to do any spine work on a razor.

I currently have King/Ice Bear 1k, 4k, 6k and 10k, plus five (5!) unlapped PHIGs. So a subsidiary question would be, is a plate like this man enough to lap five (5!) PHIGs, or should I be looking at another method?

Many thanks,

Ed