Do I drill the tank?

Think dan meant 3 T's. one for each tank. no drilling at all.

2fast, if you mean to place tees on the stock engines' fuel lines, I don't think they make fittings small enough to fit those cheap tiny lines. Then I'd have to find an adaptor to step down the tank's 1/4" fitting.

Anyway, I drilled the plastic tanks, screwed on brass barb fittings with liquid teflon and attached the 1/4" ID hoses. I also removed the Happy Time tank's filter screen, replacing it with a Fram inline car filter.

Time will tell if the fuel system stays intact.