Have just picked up a custom board, pretty much gave the shaper carte blanche based on some general details. Basically came back with a 6'6 early 70's single fin outline (wide nose - to pin tail) with a single to double concave thruster set up.
Let me start by saying I am loving this board, on my back hand though it rides nice and high but the slightest issue is sometimes I'm wrestling with it a bit as its traveling in a straight line pretty fast and doesnt really want to turn easily (I think this is what tracking means...not sure), having never ridden a single fin is this the norm on backhand? (have twinnies,quad and thruster shapes) and is there a fin set up that may help this (I have M5 size fins set up performance core...100 kilos maybe bigger fins may help?), I've just come off a fishy hybrid swalltail quad after a year so it might be just the different boards. Any similar experience, advice etc....
Forehand its the best board I have ridden.