I found a schematic to fire a scr with the highest possible efficiency at a load with a pulse of more than 2.5KA. I have the t508n16tof as the main one (x3) and it needs a max gate voltage of 2V and 200mA and the scr for clean pulse would be the mcd40-12io6 with gate 1.5V max and 100mA. I will use a 12V source for V4. So what values of R4 and R5 should I use for the mcd40-12io6? and for C2 I leave it as is? just by switching to a 2v zener? or charge C2 to 2v and increase the capacitance a little more to have the current pulse?