I have 2 questions about the TOto Ultramax. I was going to get the round bowl becos of my small bathroom but read somewhere that the round bowls don't clean as well as the elongated during flushing. Does anyone know if this is so? Also, we have a one piece Kohler San Martine where the anchor holding the toilet seat bolt is inside the ceramic toilet and there is no access to it. The seat is lose and sliding around but cannot be tightened and I have found it impossible to yank out the bolt using bruteforce as i was told by kohler customer service to do. Are the nuts holding the softseat of the Ultramax accessible from under the toilet for easy seat replacement? I couldn't tell from the specs. Thanks for any info.