I'm helping a friend of mine setup a propane and nitrous system on his C5 vette, and I was just wondering if theres any way to fill up a nitrous bottle with propane? We have 2 polished 10 lb nitrous bottles and he was going to run them in one of those dual bottle holders behind the seats and then hide the propane bottle somewhere but I thought it would be a lot cleaner setup if one bottle was filled with nitrous the other with propane, so you didn't have that ugly BBQ bottle sitting around.