I have a number of routers, which saves a lot of time in changing bits and helps with accuracy and consistency of similar jobs. But, some of our upcoming projects are going to require a lot of pattern routing using a specific bit. I'm just wondering how long my Porter Cable and DeWalt routers can run to avoid overheating, overuse, etc. Can they run an hour... two... ? I haven't seen any info on this and don't have any experience on 'pushing the envelope' on these tools. Any experiences shared are appreciated! btw - this is might-medium duty work... all in poplar.