The angle is always 30degrees b/t the 2 down pipes, the 2 bottom pieces would then have to move to accomodate the height difference. Also, the blocks I posted can be edited if we need to move the insertion points. After playing with it today, I ended p moving the ins pt to be more inline with the down pipe. The problem I ran into was the V-part at the top. The center of the V-pipes does not go through the center of the top piece, so I am having trouble figuring out how to calc where to go. Maybe Im just over looking something simple.