Alta had all three models on their website early on then they focused on the MX since it was the first to come out. If the EX has an off board charger then maybe there is a port on your SM for that charger or maybe have the dealer set yours up like the EX by pulling the on board charger.
Being one of the first has some pains but years from now you'll have bragging rights.
Hmm, I did not know that all 3 models were shown early on, I'm still pretty new, that is cool though. That is a good idea about pulling the on board charger in favor of the faster off board charger, definitely something worth checking into, I appreciate it!
I spoke to my dealer today and he thinks the EX will be shipping in the next month and that it will be available with an on board charger and an off board charger, I think the off board is the way to go since I have a generator, not certain which direction I'll go.