Dont know if those figures are correct, but what I'm sure of is that the regulator flow rate is really low, it takes about 2seconds to fill the buffer tank up to 8bar, that's too long. The regulator will be your weakest link as all will depend on it, its useless having a ram and valves with large ports and high flow rates if air is just trickling through the regulator. If I were in you I'd go for a 5/2 valve with buffer and QEV set up. It's not so complicated as it sounds, and parts should not cost too much. I'm currently replacing a similar set up to a more compact one on my robot, have a look at my build diary, there are all the parts used (mostly off ebay). If you need any help on how to build it or anything else I can guide you. I will be rigging the new set up for a test fire soonish....results might be helpful for you.