Fox-
Tweak the conveyor section to move and size the wheel art so its proportionate to your layout. Just keep in mind, the Wheel_x value 350 is the selection position. Also, change the snap coords to move the snap into the frame on the BG. I wasn't using the list but that is your prerogative of course.
fe.load_module( "conveyor" );
local wheel_x = [ 885, 839, 805, 778, 760, 750, 718, 750, 760, 778, 805, 839, ];
local wheel_y = [ -155, -75, 5, 85, 165, 245, 325, 445, 525, 605, 685, 765, ];
local wheel_w = [ 180, 180, 180, 180, 180, 180, 230, 180, 180, 180, 180, 180, ];
local wheel_a = [ 80, 80, 80, 80, 80, 80, 255, 80, 80, 80, 80, 80, ];
local wheel_h = [ 80, 80, 80, 80, 80, 80, 120, 80, 80, 80, 80, 80, ];
//local wheel_r = [ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, ];
local wheel_r = [ 24, 20, 16, 12, 8, 4, 0, -4, -8, -12, -16, -20, ];
local num_arts = 10;