DIY skills? Seems like it requires practically none as long as you have a human brain. Nice review, almost the same as setting up my initially finicky SP20s. Keep us updated on how cool the miner is during operation and how it actually performs!
Yeah it is not rocket science. If you can handle tools and you know some miner firmware/software stuff you will be fine with this upgrade kit.
It should be really easy with the S5. With S1 and S3 you need some additional modifying.
By the way,
check out the first three posts in this thread and updates by me!I got the BB board in the mail, and the
build is now ready. 
I have some results running it with Enermax Revolution 87+ 1000W PSU.