I had done this before with no real documentation of it, so when I decided to do this second one I figured I would write it up. Will be doing this over the next few days and writing it up with pictures. Essentially I will be removing the old drawer rails/wodden/plastic and glass bed from the beta and replacing it with linear rails and an R1/R1+ style bed. You could do this with any bed actually (we have another one done with aluminum, but sadly -- no write up). Others have documented this more or less in other threads as well.