Update; The 1621a will hopefully arrive around the first week of July, which will time well with re-installation of the complete system after flooring work is complete. Also, this will coincide with the installation of the new rack, which is the first full-on isolation / damping rack we have built. I hope to use the 1531 for a week or two with the new 'Ariya-Sacca' support to asses what this does for a complete system, then bring in the 1621a for comparison to 1531.
Will keep you updated!
KR,
Paul.