Good evening,
The demolition squads other grandfather has his own web site. This contains his family tree to which he added ours when his son, my daughter started a family. I have no idea how many there are on his actual tree but his data base of Mitchell's, and spelling derivatives, comes to about 12,400.
The most telling thing is that he doesn't deal with the sideways movement, or the lines coming back to the present. Only the direct line back. If he did his tree would be just as huge as some of these others.
You end up not so much with a tree but more the whole b

;y forest.
John915