Is "65g - Transparent Top, Milky bottom" the only option for the plate mount, like Octagon v2?
No, Octagon v2 uses a plate but allows PCB mounted switches.
wait, apart from this one, are all the other's PCB mount? I thought they were all plate mount? My last batch of 62g were plate mount... I'm confused.
I think everyone here is confusing Plate and PCB mount switches.
PCB mount switches have 2 extra plastic legs.
Plate mount are missing these legs.
You can convert a PCB mount switch to Plate mount by using a flush cutter and removing these legs.
You can put EITHER plate or PCB mount switches into a plate.
TLDR: You should always get PCB mount switches and if you ever find a pcb that lacks the PCB holes... then use a flush cutter to remove the extra legs on the switch.