Each brass top costs me $3.50NZ... ($1.75US)
Price isnt a factor.
When you figure in the fact im sealing with RTV silicon, and the fact that seperating the copper from the brass requires a
chisel and hammer, with serious force you'd understand that brass is the better alternative
Its a lot easier to make one top in brass, then move it to the next base, than crack every plastic top you try to remove
Also, i can plug the outlet of these blocks, and hook it up to garden hose pressure, and they dont leak (granted the hose is weak, but pulling off the garden hose from the inlet still makes a noise like a car tire popping)
That, and it looks better.