tracks for assessing cartridge channel seperation

[Wakefield Turntables]

Guys, I'm in the process of thinking about the next round of mods. I'd like to be able to better assess cartridge channel seperation but need some track recommendation. Are there are specific tracks that you like to use?

[oldius]

Turiya and Ramakrishna by Alice Coltrane is a gem. My favourite ever jazz track and wonderful interplay across the stage, left to right, between grade A musicians.

[Wakefield Turntables]

My all time favourite is by Dream Theater

https://www.youtube.com/watch?v=Q1LNAbPqyrI&list=PLd8_yDuQxHzsKA1YrkmZjZOZxYwgAr0bf&index=3

I use specifically around 1.30 to 2.30 minute into the song. It's the mostly densely packed I've ever heard.

[Barry]

Why don't you use one of the many test records available?