Hello, I'm new to building lasers. Just bought an xdrive 1.8a. Also have the m140 diode. I don't have a multimeter and I'm wondering if I can hook it up to the diode and give it 2 16340's in series and be good? I do know about a dummy test load, buy llike I said I don't have a multimeter. Holy cow I never thought lasers would be so complicated, but so addicting! Plz help. Appreciate your time!