I second that!
the $800 tool aint the press its the tool to determine the proper spacers. The ford service manual goes into it in great detail. Thats why its not mentioned in the haynes manual. Sure you can press in a new set by yourself with the sledgeomatic way or have a shop do it but both leave out the spacer issue. There are a full set of diffrent spacers sold by ford to be used in reassembly depending the runout of the new bearing set.
If you do look up old posts on this issue you will find many bearing failures not long after the bearings are replaced, the spacers are the reason.
I agree that the easiest way to deal with the issue is just swap out a full knuckle from a junk yard. pick a low milage hull and you should be fine. not all bearings die young either. My original egg has 250,000 miles and the bearings are still fine. the CV's are liekly near the end but even they are hanging in there, its a good old egg!