Nothing can make the bud to sticky... LOL. As far as the pistols go... I don't believe they fall off. During the last few weeks of flowering the bud will swell and the pistols will begin to change colors and look like they are getting sucked back into the bud. As far as telling if its done, you might want to get a microscope to check the resin glads (unless you fell you can see the trich's well enough). They will start out clear like they are now and will change to a milky white then to the amber color. If your looking for a cerebral heady stone then harvest when they begin to turn milky white. At about 50% milky is around peak ripeness. This will give you the cerebral along with the physical body high. Harvest when most the trichomes are amber for (my favorite) the full body couch lock high.
You're little bud'dies look to be doing well. I'd keep an eye on your leaves thou. Even thou it is common for leaves to turn yellow it could be some kind of deficiency. If they begin to get little black spots on the yellow leaves you may have a manganese deficiency. This is often common in indoor growing. It normally shows up in younger leaves before older.
Like your potting container. Atleast McDonald's is good for something.:jointsmile: