I have recently finished the first half of my cave instruction and would like to finish my training within the next year. Before I do that, I want to complete my tek rig. The only purchase I have left to make is tanks. I would like to make doubles from Faber LP 78s (at 2400), but am not sure that my BC will lift them. I have Zeagle Ranger and currently dive wet with single Al80 and 18# of lead. I would appreciate any input before taking this next step. Thanks much!