As part of our bathroom remodel we added a new tub and need to replace toilet and vanity. The toilet was not centered on the wall and was already close to the tub. After installing a larger soaking tub the toilet is even closer than before. i would like to move the toilet about 4-5 inches over. I looked under the floor in the basement and the PVC drain line is a straight pipe that goes directly into the main sewer line. Its a 4 inch pipe which will obviously need a bend in it to accomplish the toilet move. Is that acceptable and are there any suggestions before I tackle this? ( what kind of bend, etc)  Thanks.