Good stuff Henry, you hit on something I really believe in, weld hot! If you aren't blowing thru practicing you aren't welding hot enough. It's easy to lay something on top that isn't penetrating worth a darn. But start out welding pushing it and burning thru once in a while and learning the limits. It is much easier to back off a little than to push it more I have found. Besides when welding sheetmetal the faster you can weld it the less heat you have created.