Depending on the application, the accumulator came with a spring underneath, on top or none at all so assemble the way that it came apart. Some shift kits remove the spring and replace with a blocker rod.

Yes there are four and eight point sockets that fit those square adjusting bolts.

Although not a big deal, you will be removing three screws from your valve body in order to install the filter and extension. Here's a shot with the screws marked.