Here is my basically completed build. I am running the 525 center and roller… New rollers are definitely worth the time. I am still waiting on parts to come in for my 2.8 watt laser, and I need to order some bits for my Dewalt but other then that she is ready to get dirty. Oh also need a spoilboard as well. That is 3/8″ Phenolic I have used as a base… I Do not want my bits trying to cut into that stuff.