I think Trusty Time has more variety, but for the specific models, Luxuryclonewatch seems to source from better factories. My Aquanaut from them gets compliments all the time and nobody believes it's a clone. Just my two cents.

Ha! I tried leveling a wobbly chair with regular play sand last year. Made a huge soupy mess that just washed away. Your green sand trick is way smarter than my sad, gritty puddle.