hello Bryan and everyone else, I am very new to coiling,I have not built a TC yet(still collecting info.) but I think I can give you some infomation on Cornell Dublier 940 series(I have the data book) the 3000Vdc (750Vac) .1uF cap has a dV/dt of 1,440 which from what I have read is good for MMC use but like I said I have not built a TC yet only HV inveters so dont go on my word alone. hope this helps kevin