What shielding gas was being used, and at what flow rate? It should really be argon for stainless, and around 6 litres/min flow rate for a "standard" cup.
It would appear that the air hadn't been fully purged from the shielding gas line at the start of the weld. It's worth having a post gas flow time of several seconds (e.g. 10 secs) and pressing the trigger and waiting for the gas to stop, and doing this a couple of times before starting to weld at the beginning of the welding session. Even if the gas line is not disconnected, over the course of a day or so, air diffuses into the gas line from the torch, hence the need for purging. Also, keep the torch in place at the end of the welding run, to allow the post-flow gas to continue shielding the weld as it cools.
Apart from that, the basic weld is not at all bad.
Thanks for that voipion I was using 100% argon at 12 cfh and 65 amps, I never thought of purging it before I started as I don't disconnect anything but I will try that tomorrow and see how it goes