Now lately I've been spending hours and hours of playing tekkit, and loving every tiny second of it, though there is one thing I think that should be added to tekkit itself.
The Quantum Reverser.
http://www.youtube.com/watch?v=hp9SC9LB3N8&list=UUlX2SNmQ5oJfoY4e9j_op4w&index=1&feature=plpp_video
This idea, is basically something which I guarantee everyone has once wished to have. The way the Quantum Reverser works, is by using EMP in order to reverse something to its original matter.
The interface should have 3 points to it, a box in which you place the items you wish to add up to the specified EMP, a box for the item you wish to reverse to it's original matter (Say tools, they must be new to reverse, and if it was a red matter katana, it would only give you back the things you used for the creation of it), then a crafting shaped box where you would be given back the items which were once part of the item you wish to reverse.
I really hope this could be implemented, as it would be a key machine to have.