Ok here we go firstly the JPEG drawing file may not be to scale you can print it on your printer or take the file to Kinko’s for a full scale print. A DXF file that will be to scale is also available upon request let me know. You will need the scale printout of the parts for a cutout pattern . All the parts are cut from ½” or 3/8” heavy duty ply. The fasteners are all 1/4x20 bolts and wing nuts see pics. This could not be easer to build just follow my plans and pics. Mounting the cradles this way on the box will give a much wider spread for any 60 size plane.