Well then the Mastech will do, but just remember that it doesn't meet its CAT rating as of the current requirements. If you are playing with live exposed flash caps the meter is going to be the last of your worries.
I would bet that PTC in the ma current range will not stand up to the energy of those caps should you connect things the wrong way. Keep one hand in your pocket when dealing with those. It can kill.
I personally do not like Mastech but that is my personal opinion. If you can swing it and can wait a little bit, Franky, iloveelectronics, has a deal for members here, a Uni-T UT61E at $55 shipped if I remember correctly.