OK, guys

So I placed an order to Tower tonight for the final supplies to complete my 4* 40. (monokote, straight edge, paints, fuel tubing, etc).

Got a couple issues:

1) What is up with installing the wing? I am looking at the instructions on drilling the wing mounts, for the nylon bolts. I need to "tap" it. I am unfamiliar with what that means. I assume there is some sort of tool I can buy that creates wooden threads that match up with the nylon threads on the bolts. Where do I buy this thing? What do I ask for? I live in suburban Chicago, and have access to all the normal "chain" hardware stores, etc. I built an LT-40, so I am not a total novice, but I just dont know about this issue with drilling the wing mounts.

2) My wing currently fits the fuselage "like a glove". It fits snuggly. I dont have to force it, but there is firm contact wood-to-wood contact everywhere when I slip the wing into the fuse. It fits perfectly. I am wondering if it might be too snug, and not fit once I cover the wing. Looking for a little experienced advice on this issue. Should I sand it to the point where it is "a little loose"?

3) I'd like to put the wheel pants on. However, I really dont see any at Tower that would work. Sig recommends a sig part for that. I am using the Du-Bro foamie wheels, 2-3/4". I guess I need to order Sig Pants from my local hobby shop. I am going to put a nice finish on this plane. I am covering this thing in Sig Monokote Skyblue and white, and using LustreKote paint to finish the landing gear, paint the cowling, and of course, fuelproof the cheeks and the inside fuel tank area of the airframe. I am wondering if I pursue the wheel pants? I see lots of pics of them in these forums. I know they suck to fly off of grass with...and my plane is gonna fly off of grass. I hear they are only good for taking pics.

-Tom