YW. It seems you did the right thing under the circumstances, but cantilevers are usually tapered, so it must be very difficult to align. But there's more. Without seeing it in person I would be a little worried about it leaning a little one way or the other and about a potential affect on compliance and the tracking and tracing performance of the cartridge in general. The cartridge is not designed to be put into use in that condition, so I'd follow Sean's advice and take it back. If they are unwilling to take it back, do they have a serious test lp to use with an oscilliscope?
Paul