Just because I was too lazy to put my Sledge manual away after last time I tried to answer a Sledge question..still setting by the 'puter.

And Constrictor..look ahead to Fig 12..that shows the entire bottom center section sheeting.

And while I'm at it...

One thing that sorta kinda bothers me about the Sledge is the access to the aileron servos. You can't get to them after it is covered. I had to cut my covering to get them in...I had pre-fit them, took them out to cover, then realized I couldn't get them back in. Notice how I have checkerboards (now) over the aileron servos. Weren't always so.

If I have to replace gears or servos, I'll cut the whole mount out thru the bottom rather than cut the covering on the top of the wing. So far..knock on wood.