No I stand by my statement about crossing to often but to succinctly rephrase my early and often: crossing to inserted varieties or species leads away from exsertion especially when done more than once without pausing a year or two to allow exsertion to segregate back out and stabilize a bit.
The Solanum chmielewskii? crosses sound neat. I think you have been very persistent in assembling a large number of species that many of us simply haven’t had in our collections. I haven’t tried that species.