Caps in series lower the overall capacitance (like resistors in parallel) , but raise the energy stored. Try putting 3 or 4 of the 10x caps in series (for 3.3x

Caps in series lower the overall capacitance (like resistors in parallel) , but raise the energy stored. Try putting 3 or 4 of the 10x caps in series (for 3.3x and 2.5x capacitance respectively).