Adam theres no real need for dual compressors. aslong as the one can fill your buffer tank quickly enough- so you dont want a buffer thats to big.. but you dont want one thats too small in comparrison to your rams. With LP equipment you will find that flowrate is a big factor.. i.e. flow from the buffer.. into your valve.. then into your rams. Anything before that in a compressor system isnt to important i found as your bound more by the flow of the compressor then the flow of your pipework. The buffer im supplying took about 20seconds to fill.. but thats from the second you put the robots link in and its generaly atleast 1min after you put your link in until the fight comenses.. and it will probably turn itself on for about 6seconds between each flip pressuming you have no leaks. You can however still use ur weapon while the compressor is on..it just wont be as effective as if you wait.
anyhows, i just replied to your PM- ill sort some stuff out for you tomorow.