Yep, in my second paragraph on "Paragraph 4" of The Wing Panels I mention drilling holes in the ribs if you're using servos in each wing panel. But I sure didn't go to the extreme that David did. Looks like you've either got a major rodent problem or you really like swiss cheese! ;^)

Hollowing the tip blocks is mentioned in step 22 of the original instructions. I didn't bother to reiterate stuff that was already in the instructions. As a matter of fact, I did hollow mine some. Actually I only hollowed one as the wing came out slightly unbalanced, even after I weighed every part while building.

I also did some serious hollowing on the Fuel Tank Compartment Top Block (step 5). But I did't take into account just how aggressively I was going to shape the nose. So when I carved the fuse I wound up cutting through to the forward corners of the hollowed area. No big deal, I just whipped up some epoxy and microballoons to fill the area from the inside and kept right on shaping.

On my first DB, I did inlay 1/32" ply into the centerline of the wing and stab tips. I didn't bother on this one for some reason. When I do this I usually wait until after carving and just cut a slit with an X-acto knife. Then you can just slide pieces of 1/32" or 1/64" into the slot and CA them in.

One thing that I do on the wing tips that I didn't mention is that because the trailing edge of the wing tip gets so thin and is succeptable to damage, I cut about 3/8" of the TE off after it's carved, glue on a piece of spruce for the wing tip TE and carve it down to shape. I think you can just barely see it in this photo.

Another thing you can see in that photo is a hole in the rib. I like to make sure all rib bays are vented to prevent the covering from "pillowing" when you use the heat gun. The easiest way to make vent holes in the ribs is a single hole punch like for use on paper. It works great! As a matter of fact, I used the hole punch to make the holes for the servo wires. I just punch two or three overlapping holes and trim with an X-acto.

Dave