I’ve had lead shot and fine sand filling my stands for 20 years and have recently done some other speakers with the same lead/sand mix... the idea that lead is toxic in stands is ridiculous, your not eating it, your not handling it, it’s inside your stands never to be seen or hurt you.
If you’re extra soy you can wear some gloves when filling your stands, but nothing will happen to you and it’s the heaviest and best thing that you can use, and not too expensive although it’s way more money these days.
