Can I build a diff myself, and anybody used this tool?

Yeah so far, everything is 100% me, including the 904 rebuild (which was a first for me, auto trans anyway).

Some things though, with the extra specialty tools and time it may take me, are less expensive to pay out for labor!! :)

In the end, I like doing my own work for the pride factor, and I've seen way too many shops turn out worse work than I might do on something my first time...just have to see if this tool will work for me.