Changes

For most of them, all you need is to connect 5 pins of the CPCs 6pin DIN connector to the right pins of a VGA connector - and that's it.

A known example for a perfectly working monitor is the BENQ 702A. More examples can be found here, but be aware, although the [https://pinoutguide.com/Video/VGAVesaDdc_pinout.shtml VGA standard should accept Csync on pin 13], some monitors expect separate v-sync and h-sync signals. In those cases, an adapter, that splits c-sync into h-sync and v-sync would be required.