Here's a picture of the new base for the towers. It's a 2" maple slab with adjustable spikes. I also increased the size of the holes in the tower base so I could use thicker bolts to attach to the slabs. I wanted it to match the colour of the speaker grills, this is as close as I could get. Kona brown stain with wipe on poly finish. I learned the 'tried and true' brand finishes don't work very well for durability.
MUCH better than stock! Have any pics of the underside? Are you going to attach the angled piece (or maybe attach it to the underside of the speaker instead)?
Here's a picture of the bottom of the base. They're not sitting on the small steel cups/pucks at the moment. I used 5/16 x 3.5" bolts and larger t-nuts inside the cabinet. I decided to bolt them directly to the new base and leave out the angled piece as the spikes are adjustable. The new base plus spikes raise the cabinet about 3" over stock. I bought this model: https://www.parts-express.com/dayton-audio-dss4-g-gold-speaker-spike-set-4-pcs--240-718
All capacitors have been replaced.
All are Dayton Audio polypropylene except for the two large electrolytics. There were no exact matching values so I combined values to equal the stock values. Here are the part numbers from Parts Express:
IDEA...
Strip the original finish off the speakers. Re-stain them in the same Kona brown you used on the bases. Poly as well. Re-cloth the grilles in the darkest jet black cloth you can find. Take the Infinity logos off the grilles. paint them jet black. Then lightly sand the raised letters till you get through the paint to the bare metal. If you sand with 1500 grit, you should be able to sand it to a clean sheen. The silver lettering and Infinity logo will pop out from the dark colors and will look great.
G~