On my Meridian, I am using the Electra glide Fatboy also (older6" version)
I own the Electraglide Fatboy,fatman,and Referenece, Whale Elite, Zu Mother,Jps and have tried many others .
With the fatboy on the Meridian , the Meridian plugged into a PS300 and the Ps 300 connected via a Fatman to a PS600.
This combo work's best for me.