Many thanks for the reply! Not surprised it is from the rep. But that's OK.

I did mean that model. I have researched both - of course the plus is better. It's about the $/needs ratio for me.
I did not follow the how-to-by link so that's helpful. Thank-you.
Not really kicking the tires; I have the ssa3021x in the cart, coupon applied, was going to push the button yesterday; in pause mode.
(in pause mode partially because I had a nice reply from Gandalf_Sr on a common project; inspired me to get a microscope, so now have to work in a sa plus a microscope)
Thanks again for the helpful reply; I will research the other resellers now .....