Are you saying you want maximum zoom (biggest image) or the lowest zoom (smallest image)? It seems like the shortest zoom would allow you to put the pj closer to the screen giving you the brightest possible image.
You want the most zoom at the closest distance, which is around 11' = brightest image for that size.
Has anyone replaced the Color Wheel on their H31? Mine fell apart and I was able to get a new wheel for $59 plus shipping from Optoma. Can any one give me some pointers to cracking open the projector and replacing the wheel? Thanks!