Is there any dif. in these machines? theres almost a $100 dif. but dont know what the big dif. is. Anyone know? I see the output range on the 175 plus has a 5 amp less output, is that the only dif.? Im getting the machine to weld up charge pipes and manifolds. sch. 40 would be the thickest im going to be welding. Will this machine be able to adjust accordingly to the material thickness? Im just in a dilema right now to either get the sp-135 or the sp-175. Money really isnt a problem. Let me know guys if you can help me out with my choice. -Nick

 

I bought a used Miller that will put out twice the amperage, came with a cart and water cooler....for less than you will pay for either of those.