I think for a good community build we should create a metropolis with many sections for each mod instead of one metropolis for power and machines. Each mod will be implemented into this build but I believe that the most implemented mod will be Redpower 2 because the entire metropolis will be made out of a lot of microblocks. I think we should make a nice separate area for UU-Matter production that only some players can enter because there'll be a password to get in to the area using Computer Craft. Also most of the areas which you only get very late in the game should only be allowed for players which have been playing for a certain amount of time. I think that the first people that got whitelisted and are very ahead in the game should be allowed to enter these areas. Also I think that mods/admins should also be allowed in these particular areas. Another thing are plots in the metropolis for shops that players themselves can create and sell what they want to sell. Also a fun room should be implemented where there are indestructible blocks and mining lasers, so it is like laser tag, and games with teams and free for all games as well. I have many more ideas that I think I can't write all of them. Thank you for reading!