It’s really not that hard. It’s definately not for someone who has never picked up a wrench before, bot someone that is mechanically inclined can do it. There is just a lot of research to be done, the hardest part is figuring out what works where? Can I use this? Will this break? Stuff like that. The UK locostbuilders board is an excellent resource. The US one is pretty good, but not nearly the traffic of the UK one. There is a US Yahoo mailing list that is good too.