You want an aluminum heat bed and not for financial reasons..



The proximity sensor you might want to use for z axis end stop doesn't read the glass. I started with glass. Then to stop the corners from lifting I covered the glass in blue tape(which works very well) And then to get the auto bed leveling/tramming up and going I needed a proximity sensor attached to the print head. I did this conversion a while ago just to reduce setup times before each print. And now it is the only way for me. I detailed that conversion on page 4 of this thread: http://3dprintboard.com/showthread.p...Mixing-Printer