hmmm not sure what your contractor means by not 100% smooth, cos our's is pretty smooth after all the grouting has been applied! Our toilet doors are PD doors, so it can open fully. Not a problem But you're right, if it were sliding it would be very difficult to go in and out. I'll inform you, Songz and OceanEleven about the house visit! akan datang! PM me your number? Sorry to hear about your aircon trunking! It's definitely one of those things that you don't really consider under you actually have to do it. It really was a headache for us too. I had to get them to stop work halfway so that we could re-plan the route. It looks like yours has already been fixed up though, so boxing it up will be the way to go. A lil bit more money to spend I agree, but it's better than living with an eyesore. For the MBR trunking, not advisable to tile over it, but for the drainage pipe, definitely better to reroute it to a drainage hole in the ground.