Summit Button at Nevis Range tops out about 3910ft. A decent length of handle tow part way up the Marquis Well would give CairnGorm the highest lifted point, without entirely taking away the walk required to the Summit and to properly breach the watershed.
As for highest stations then the Summit Station at Snowdon is 3500ft.
Cairngorm 3,599 ft which is actually only one foot lower thatn summit of Snowdon - 3,560ft they should of added a couple of feet to the foundations. Of course my detail came from the JFGI so may not be accurate
I assume you mean 1085m/3559ft for Cairngorm station.
The Snowdon summit station at Hafod Eryi is a little below the summit of Snowdon at 1065m (3493 ft) if the sign on the platform is correct, so I think Cairngorm just edges it.