If you wanna read some good threads about welding with your 350-P go to www.shopfloortalk.com
I learned more about my machine over there after I got it and just lately remembered that!
Just do a search using no more than the keyword 350-P and it brings up enuff to keep you busy for awhile. (I checked for you just to make sure)
BTW when you start reading all this Shadetree Welder is the founder of the website
I really dig that place because there is so much more to read about besides welding machines. Their archives are priceless. Also make sure you join up before you leave because they have several sections that are visible to members only