One thing you need to be well aware of is that if you bought those IRF4905 MOSFETS from an eBay (e.g. China/Shenzen) vendor they are extremely likely to be fake.
I nearly set fire to some equipment using eBay fakes - it was only when I blew the top off one of the device, I found a 1mm x 1mm die rather than the expected 5mm x 5mm die. Its easy to check - turn the device on, measure the voltage drop - it should be millivolts at 1 or 2 amps and it turns out to be more like one volt...
Even when running with a fraction of the rated 70 amps for this device type they were melting solder and charring the PCB.
Unfortunately, trying to prevent this issue by buying more expensive parts from China does not work. I bought three different batches before giving up: The devices are accurately marked as IRF but the fraudsters have spent all the money on the printing of the markings, not the silicon inside !
Go to Mouser.com or element14.com or whatever, pay about £2 or $2 per device and get the genuine part. Then try again.