Thanks Dennis, appreciate the efforts, I think I've got the concept 'right' in my twisted little mind, it was more the actual implementation that has had me guessing. Your mount makes a lot more sence!
A clear head, a day off work, no soccer last night and a pot of coffee and I'm thinking that Mick has confimed my suspiscions ! The nail in coffin was the 35 degree template I drew up didn't match by any stretch of the imagination to my wedge set at 35 degrees.
If I ever find myself in Monbulk I owe you a beer at the local.
al