Hey Joe! Yes, the gate resistors were 30, but I changed them to 20 in the last 3 (yours, Bens, Adrians).
Here's the capacitor datasheet:
http://www.panasonic.com/industrial/..._ed_ts_dne.pdf
These are some pretty robust caps.
I don't have any info on the number of hours for the mosfets/diodes at a given temp.