I'm adding a bathroom in my basement...the under-floor plumbing was stubbed in when the house was built (4 years ago) Whoever put in the underfloor plumbing assumed I would use 3/4" furring-strip walls. Not realizing this, I went ahead & framed 2 x 4 studded walls. I'd like to keep the wall I've framed, and I'd rather not tear up the basement floor. (I've got 9 1/2" from the centerline of the toilet pipe to my finished wall) I've seen offset closet flanges at the plumbing supply store, but the guy working there expressed some reservations about using them. How bad are they?? Are we talking an occasional plunge or will I need to bust out the auger every time my kids use this bathroom???