谢波大！我会把你的建议跟heady man说。就在此时，plumber 非要来

看看。这是他的意思：

K. What’s happening with the toilet drain?

Best way to deal with the toilet drain is to support the drain pipe, cut the vertical pipe, install and support all plywood edges, drill hole for toilet pipe and reinstall the flange on top of the underlayment. Sounds like you’re on the right track. Just checking on the plumbing plan