Bumping an old thread; I've had this flash and the replacement capacitor sitting around for a few months and finally got around to the repair tonight.
I got the new cap in successfully and so far, my flash is working great.
For the record, my flash has a metal base and the discrete (i think that's the right term - not surface mount) capacitor, like in rpolistr's photos.
Thanks rpolistr so much for the instructions. Hopefully the fix will work for me; if not, into the recycle bin it goes.
Note to those who come after - metal film capacitors do not have polarity, so if that's the kind you get you will not need to worry about that.