Does it do the Trevor Rabin "Owner of a Lonely Heart" and Thin Lizzy twin harmonised lead thing?

I'm presently using an old Boss GX700 that will do this, but the harmonies aren't particularly stable so you can get warbling. It's time I replaced it.

Also, is this unit going through the FX loop of the Eleven? I find that the FX loop with the GX700 seems to add audible phasing if the return is set too high.