Arrnger modules are generally a pain.

I had a few...mostly Rolands.. RAs...50, 90, 95 etc.

Unless you can set them conveniently on top of your controller, button access is very poor...and the buttons on the controller better be ultra programmable if the module must be placed elsewhere.

Generally more of a nuisance than a benefit, in my experience.

A rack module with just the T3 sounds would make more sense than an arranger module.

Ian