The upgrade kit is really of no concern if you're vaping at 1.2-1.5Ω. That's the range the stock REO was designed to handle. This whole subΩ upgrade is really just to help out the superlowresistance nutcakes ( . . . . . ). I see no point in waiting to purchase for that reason. Personally (and this is just me), if I were vaping my REO's at 1.2Ω, I wouldn't even bother with ordering upgraded contacts.