ironically while roger was away from the cathederals gerald played with them for that time. during that time, george had a heart attack or some health issue, and had to take a leave of absence from the group. i'm not sure you'll find any videos or such but apparently gerald filled in on bass during that time. maybe why roger makes a ocmment about never hearing him do bass because he wasn't there during that time and also roger's got no more business on bass than sandi patty.