I found a rust free hatch for my SVO. It was not an SVO hatch and as you know the spoiler is much different. To transfer the hole pattern I took rosin paper and laid it out on the SVO hatch with the spoiler and bi wing removed, taped it down and used the side of a pencil and rubbed it along the edge of the hatch for the outline. Then with scissors cut out the outline and set it back on the hatch and lined it up and taped it again. I used the pencil again to rub around the mounting holes, I used a pin to poke holes and finished with an exacto knife. When I laid it back on the hatch the holes were not perfect so I laid tape over the holes on the paper and used a small exacto knife to recut the holes. Perfect! I placed it on the hatch and transfered the marks and drilled holes. It fits like a glove. I just thought I would share. I'll gladly post pictures if anyone needs.