Hi got my first brass/copper radiator didn't know what it was until I got the steel off thought it was dark aluminum lol banged it copper to my surprise. Brass tank ends one end has a steel thing inside it I was thinking on buying a osilator tool little more control on cuts since I have to cut the nuts out cause they soldered them on or something won't turn they normally turn. So do I cut off the end then cut the bolts then pull it out that way? Don't want to cut to much. What do those normally go for are they worth more than copper/aluminum rads?