If you take the standard version of the MRJ90 and put in two class with economy plus or whatever you want to call it and reduce the pax down, you could get it inside the weight requirement if re-certified. I'm not sure how difficult the actual re-certification would be but it's possible. With the normal 9 first class configuration you already see in the market, it would also be 81 seats. You could add more first or more economy plus but maybe that would ruin the RVSM. The E2 is supposedly way heavier than the MRJ. Something like 10000 lbs on MGTOW but I can't remember exactly. It'll be interesting to see what happens.