Bala Lake - change of couplings?

I notice from photos that the Bala Lake railway is changing from screwlink couplings with side buffers to FR style chopper couplings, any particular reason apart from bringing it more into line with other 2ft lines around the country?

 

This is from the February update on their website,

“The engineering team has also started the daunting task of making new couplings for all the locomotive stock, thus standardising coupling up. With some locos having buffers and others not, the new arrangement will make life considerably easier and faster for the loco crews, plus it will bring the BLR into line with other 2 ft. gauge railways, thus visiting locos from other lines, or ours making visits elsewhere, will experience no problems at all. The other bonus is that as the BLR often features double-heading (and sometimes more), the new coupling arrangement will mean that every loco is compatible and coupling up can be done very quickly.”

Chris