Thank you everyone for your input and help. I've managed to space the rack out less than 1/2" per side after tucking my Leo Vince mufflers in more diligently. I'm all sorted out and didn't have to modify any of the Jesse racks.
2012 KTM 990 Adv-R
2014 Superduke 1290R on its way
And how can this be? For he is the Kwisatz Haderach!