Hello everyone, would like to know a couple of things here. One, where can you get the extra lower rods for the Quattro. And how much do they run. Another, I am looking to maybe buy a used Explorer XS. For those of you who have both the Quattro and Explorer XS. How do they compare. What are their similarities and there differences in the field. And, me just getting back into the THing thing after awhile off. I haven't really kept up with the advances very well. So, what is the difference between the Explorer XS and the Explorer II. Thanks very much for your help, Mike in KY