Sorry for the late reply. I've been off of here for months...
I used the plastic cups with filter media because its easier to change out than socks. Work about the same.
Honestly I do not have the list of plumbing parts. I basically borrowed similar plans from Broadfield's build. Basically you can try to figure it out from the picture. I used 1 inch plumbing except at the reactors, where I down size to 1/2 inch. I got most of it from BRS and plumbing supply.com
Lots of options for lenses. I recommend starting with a simply kit lens but if you are ready to move up my fav's are the
Rokinon 16mm for wide field and the Nikon 180 for deep field work. you will need a good tracking mount if you go with the 180.
Hope this helps.