Update on dialing in my MBL101E speakers.
Instead of using the factory supplied spikes or trying expensive aftermarket footers, I completely removed the entire factory footer assemble (spikes and brass coupling), and place speakers directly to my Symposium Ultra platforms.
I also pulled the speakers out further from front wall to 52" (center tweeter), no toe-in.
Results were firmer bass and great vocal center imaging.
Minor adjustments will also be a lot easier since the Symposium platforms slide easily on the carpet.
Of course the biggest improvement was adding the REL212SE subwoofer!