Lyle wrote an answer about Optimus Nova Stove on July 31, 2009
Do not ever ever ever use the MSR bottle with this stove!!! I used one with the stove a few times and let me tell you, you might not notice it but gas is going to leak out around the pump. The top of the MSR bottles are rounded while the Optimus bottles are flat on the top. If one uses the MSR bottle the pump will not make a good connection with the tank because of the rounded surface and fuel will leak out slowly, sometimes to slow to notice. Since Optimus uses a metal pump if that leaked gas catches fire you could literally have a bomb go off in your camp. Not good!