I don't think David was a problem at all, he never really took part in any tribute band and as the lyrics from TOTT and OSAAT may suggest fakers wearing his old shoes are those who piss Mark off at this stage.
are you joking ? They haven't been talking for decades, the family/kids of each don't even know each others
I don't remember Mark saying anything harsh about David over the last few years so everything is possible. As for Alan we all know how Mark feels about him.
We think we know it, but we don't.
Recently Alan mentioned he talked with MK regarding the record he was recording of piano versions of songs he (Alan) has been involved during his career, and that MK liked the idea and gave him his permission to record his songs.
Also Alan mentioned in Facebook he is surprised people think they are not on speaking terms, and told that story.