you may be able to attach genuine loc-line the stock fittings. it can be a bit hit and miss, but it does work sometimes. Then you can attach the 1/2in RFG to the loc-line.
A better option would be to use the our 19mm to 1/2in RFG slip-fit-drop adapters to attach the 1/2ub RFGs to the tank. if you want more ability to angle it, you can also attach 2 to 3 segments of Loc-Line to the drop adapters. However, you may not need it, since ehte RFGs will pulse/push flow in random directions at about a 30 degree angle from the tip of the nozzle.
The pump you have chosen should do really well with the dual 1/2in RFGs.
With that said, If after you get it setup, you want even more randomized flow, each 1/2in RFGs can easily handle as much flow as a single mightlyjet can create. The more flow you push through the RFG the more pronounced the randomized effect.
if additional questions, please let us know.
Thank you - I've posted this reply in my build thread so other JBJ tank owners can benefit from the answer.