I have Decware Zen Open baffle speakers - 8" full range drivers from Decware and also the cabinet design from Decware. I built the cabinets myself using the Decware design - v1 was a disaster, so I got my local lumber shop to cut the larger pieces, and v2 is fine. My guess is the speakers weigh 70-80 lb. They are heavy and awkward. I weigh 140 lb and can pick them up, but very awkward. I have a 85 lab, and he is awkward to pick up - but he moves more than the speakers :-)
Last night I took the nobosounds out from under the TT because the legs on the TT kept moving around on the springs. Put the stock TT feet back under the TT and put the hobo's under the amp. Left them under the speakers.
Lots of air, detail and presence around instruments, voices. I listen to jazz, blues, Hendrix, Gary Moore, Steely Dan, classical, Diana Krall, Joni, Miles, Bill Evans, Lyn Stanley. I need to listen to all my albums all over again. I really can't get over the SQ now. A real AHA moment.
The reason I went with springs is I was reading some article somewhere about springs isolating vibrations better. There are also articles about having two dissimilar materials sandwiched by a vibration absorbing material. I sandwiched some 3/4" solid oak with some granite from a local counter place. The sandwiched material in the middle is from a company called ASC. I got ASC from @bdp24 here on this site - THANK YOU! Its double sided sticky and worked great. The TT and phono preamp sit on this sandwich. The amp is just sitting on the springs on my hifi stand. Going from top to bottom the TT is top, then the phono preamp, then the amp.
I have not tried the cork products pictured above. Not sure how they would work as it looks like you have rubber on top, then cork, then rubber. The articles I was reading said 2 dissimilar materials, with a sound absorbing layer in the middle which is why I used oak and granite. Apparently this is common in auto manufacturing to absorb sounds.