I use both my WSM's primarily for ribs and here's what I've learned:
1) Baby Back ribs are worth the price.
2) The BRITU method is by far the best out there.
3) The BRITU COOKING method must be followed pretty closely. Remove the bark and burn the wood down. Don't add any more.
4) I originally had the salty issue as you. I now substitute Kosher salt in the rub recipe.
5) Like Chris says in his article, don't use too much rub. A little goes a long way. Get a shaker to apply it.
6) Use enough fuel. For almost a year I tried skimping with only one chimney of charcoal added to the previous cook's leftover charcoal. After 2-3 hours, I could never kick the temp up to 275+.
7) If I stir the coals and notice soot rising, I'll then 'rinse' the ribs with apple juice from a sprayer. Don't want that dust settling on the ribs.
8) If the ends are dark at the turning point, I foil just the ends. Otherwise I don't.
9) After another couple hours,I remove the foil, baste, and let smoke another 30-45 minutes.
10) Use 'homegrown' honey instead of standard grocery store varieties, if possible.
11) Remove from the smoker, wrap completely in foil, then some towels, and put in cooler to rest for at least an hour before serving.
I've read threads here where people ask how to make ribs that look like the cover of "Smoke and Spice". Mine look like that every time.
I have had two parties recently where I brought 3-4 racks of these ribs. I have had eight strangers tell me they were the best ribs they'd ever had. People who know me already ask for these. My recent modifications were merely following the cooking directions closer..more charcoal and pre-burning the wood. My advice is to re-read Chris' article and follow it as closely as possible. If you're getting salty ribs that aren't tender, you're not doing something right.
And one more thing: I am just not seeing as much of a difference whether I use regular cryovac'd or injected ribs. The last few have actually been injected (enhanced), and they have brought more compliments. Not salty at all.