I'm surprised that no one has mentioned a dremel tool as yet. You will also need some covering tools when you get to that point. I've found that a small covering iron in addition to the large size is very helpful as well. I have built airplanes for 36 or more years and finally bought one of the small irons for covering and I don't know how I ever covered an airplane before it.
Still not very good at it but acceptible.

Good luck on your build, you will find it an enjoyable experience and rewarding when you can say I built that in this world of "buy it in a box" society. Good luck and have patience.............sugarfox