Ray,
I would always keep some filler close at hand for this, especially if you burn through, you will need some assistance.
Here's what I would do:

Set the AC freq about 100 or so. Set the Balance around 30%.
Set preflow for about 2 seconds for the smoothest start. Start amps about 10, upslope 2 seconds, Welding amps about 30. Down slope about 3, end amps about 15. Post flow for about 5 seconds.