We use Bluebeam. One nice feature is that you can batch plot a set of drawings with it. I have had problems in the past with the wipeout, but not lately. As others have said, this may be a a problem with the driver rather that the software. As a side note, Bluebeam also allows basic editing...
The requirement is that I use the rational method for the pre-existing conditions and compare it to the critical storm. In order to find this I have to run 2, 5, 10, 25, 50 and 100 year storms for the 1 hr, 4 hr, 8hr etc. storm for the developed conditions. I talked to the regulatory agency...
