The camera is already so huge - why do you want to put a grip on it?

Yeah the S3 Pro is a totally awesome camera! The integral vertical grip is only so-so tho - should have added in some command dials to make it more complete. I think the D70 is large and heavy enough (and the D50 too) to be used without a vertical grip - the weight balance only becomes a problem if you have an SB800 with 5 batteries attached to the flash hotshoe for prolonged durations ...