Bartolinis in a Streamer Stage 1 - active/passive pot issues?

I've ordered a pair of Bartolini Quads and an Aguilar OBP-3 to replace the MEC pups and preamp in a Warwick Streamer Stage 1.

I've been back and forward for a couple of weeks now trying to get advice from Bartolini on what pots are needed; the OBP-3 comes with suitable tone pots, but I'm not sure if the existing stacked volume and pup pan pot will work with the Bart pups?

The MECs I think are active pups, they have the gold logo on them and have a red (power?) cable running to them as well as the white (signal?) cable. The Barts are passive, will they require different capacitance volume/pan pots?

The stacked volume/pan pot in there at the moment is this one
WARWICK MEC Volume / Balance Push/Pull Pot Module, for active Pickups, R5 Connector
According to that site its 500 kOhm for the volume pot and two 25 kOhm bits for the pup pan/blend.

Thanks very much in advance...