Actually the Stand4 is only 3 or 4 years old. They replaced the Stand2. The difference is the Stand4 has a larger opening at the bottom to make it easier to fill with sand. When I first got my original C1's my dealer brought over the Stand2 and when I asked how to fill them he looked at me with a grin and said "grain by grain" (because the opening was tiny) and gave me his Stand4. As far as filling the tubes I highly recommend using the foam insert for the top of the speaker and setting the speaker in it upside down. Leave the grills on and use an old towel or sheet to cover the speaker because if accidentally spill some sand you don't want it to get stuck to the Esotar2 tweeter. Now if that should happen crumple up some scotch tape and get it off that way. DO NOT use electrical or duct tape because to is tooooooooo sticky and you may ruin the tweeter.
I should be getting an answer tomorrow from Dynaudio in the USA
I should be getting an answer tomorrow from Dynaudio in the USA