I am looking for something that will groove 1-3" sch. 40 304 SS pipe, as well as, thread 1-4" sch. 40 galv. pipe? Is the 1822I with a 918 the answer? If not, what options do I have? We don't do a lot of pipe work, so I don't need something ultra heavy-duty. But, I don't want to buy the cheapest thing either? I called customer service and spoke to a woman who didn't seem to know the product lines very well Your suggestions are appreciated!