Nitecore P30 NEW remote switch

Hi people I just need some help P30 owners.

Older model that support 18650 cells is replaced with new on that supports 21700 cells.

Questions that I want to know is what is tailcap diameter of threads of older model ?

New one is about 25.2mm.

I just want to know to they changed a remote switch for this light or older model of light remote switch can be used in this new version of light ?