How can I increase the allowed execution time for a CSOM Client Context?

I am running SharePoint 2013 and have a Windows app that creates SharePoint sites with CSOM.

I have used Powershell to adjust the ClientCallableSettings, lengthening the ExecutionTimeout to 3 minutes. That is successful.

I have set the ExecutionTimeout of my ClientContext to 3*60*1000, which is 3 minutes.

I have changed a web.config file that is located at C:\inetpub\wwwroot\wss\VirtualDirectories\80 of my SharePoint server to say

and have reset IIS, but I’m not sure about this being the appropriate web.config.

I am still getting timeouts at about 110 seconds (more or less) and I can’t stand it.

Can anyone help me?