I have made a calculator for easily and quickly doing the initial design of the capacitor tank for SGTC, VTTC, DRSSTC and other Tesla coils with a resonant primary circuit. There is 4 basic inputs like capacitance, voltage rating and how many capacitors to use in series or parallel. Advanced inputs is detailed capacitor ratings and a few primary circuit values from your Tesla coil.
I hope you will enjoy this tool as much as it helps me do the quick calculations in the every day Tesla coil design where a online calculator is a little bit closer than all the spreadsheets that are deeply buried somewhere on your hard drive 
http://kaizerpowerelectronics.dk/calculators/mmc-calculator/
Great Calculator! A very helpful resorce for an amateur coiler like myself.
Thanks, William A Tickhill