[Eeglablist] A question about creating a personalized montage

[Ratz-Lubashevsky, Rachel]

Hi all,

I'm intending to run an EEG experiment in the lab. We are using Brain
Vision.
Recently I discovered that our flat (external) electrodes are worn out and
can't be used. In theory, I could use the electrodes from the cap as
external electrodes but this will mean to create my own montage with 58
instead of the original 64 channels. Does anyone have experience with such
an approach? Is this a practiced method for recording? (If I maintained a
symmetrical montage). If so, what would be the recommended channels to use
as external ones? (while mining of course not to use any theroaticaly
relevant electrode as an external one).

Thank you,
Rachel