I vote for this. In FTB, you can always add on to things. Like you could have a machine that farms reeds then cows then makes books, and once the book is detected, it sends a signal to x, which makes y happen, etc. it's fun and can be very cheap, limited only by your imagination.A needlessly overengineered Rube Goldberg Machine is always nice, and can keep you busy for days, if not weeks.