Thanks for the confirmation, folks.
Scott, I bought the silnylon from your site--excellent, fast service by the way, and the product looks great (and a nice price). WRT the weight--I expected 1.4 oz-1.5 oz w/coating and this is more like 1.6. No problem *at all* with that--the weight gain is trivial. I was wondering if this meant there was a bit more sil, and thus the fabric was a bit more waterproof. Seems I've read that some silnylon 2nds are less waterproof than some 1sts.
Obviously, buying 2nds I wasn't expecting perfection. But in my limited experience, this looks pretty close to it. Can't wait to get started on my shelter.
Thanks again for the help.