I use to have the 360 precision head and got rid of it and just went with the Manfrotto 338 leveling base for my digital stitching and I will also be doing it with the trialling of stitching shots taken with my Hasselblad 6x6 outfit.
I have never had any stitching issues, in fact less than what i had with the 360 precision. (very well made head though) and I think the 338 is only $94 US. Cant get more cost effective than that.