i had similar problems of 4110 FETs blowing out. my solution to this was to add 1/4W 22R resistors in series with the gate of each of the FETs. i did it the lazy way. i just unsoldered the gate leads from the board, lifted them out of the hole and added axial lead resistors in series.
I got this tip from some International Rectifier app-note that i can't find at the moment. they recommended that parallel FETs need the gates isolated from each other when using 10R to 50R resistors. i had some 22R handy so i used them.
We will not be responsible for damage to equipment, your ego, blown parts, county wide power outages, spontaneously generated mini (or larger) black holes, planetary disruptions, or personal injury that may result from the use of this material.
- Samuel M. Goldwasser -