Ldworet,
Use the combo method described above. Make sure you listen after each 15-20% of filling and fill no more than 75% at most. You may find the sweet spot at the first 25% and find that using any more dampens the sound and you may loose all dynamics, bass or treble energy. My recommendation would be to add a little and listen to some favorites you know Extremely Well. Repeat until you achieve the desired effect you are looking for. Keep track of your filling weight measurements in case you latter decide 33% sounds best. (Use soft rubber washers on the bottom plate between the plate and the silver washer before screwing in the bottom plate. This will make a nice seal so that sand/lead dust do not leak out the bottom.) Good Luck!
Use the combo method described above. Make sure you listen after each 15-20% of filling and fill no more than 75% at most. You may find the sweet spot at the first 25% and find that using any more dampens the sound and you may loose all dynamics, bass or treble energy. My recommendation would be to add a little and listen to some favorites you know Extremely Well. Repeat until you achieve the desired effect you are looking for. Keep track of your filling weight measurements in case you latter decide 33% sounds best. (Use soft rubber washers on the bottom plate between the plate and the silver washer before screwing in the bottom plate. This will make a nice seal so that sand/lead dust do not leak out the bottom.) Good Luck!