I was looking at the EX250 as opposed to the LX225 I bought the latter, (I love the machine by the way). I still can't find any explaination of what Arc Force is, The welding tips and tricks guy blew it off saying it had something to do with stick welding. I've looked in all the welding books I have and can find no reference to arc force. It's not really important but it's been nagging at me. Anybody got an explaination?