Hey Lugnutz - Is the [a shop] press needed for the ~disassembly~ phase on a full rebuild?
The short answer is yes. You need a shop press to carefully
1. remove the countershaft from the case.
2. remove the 3/4 slider hub
3. remove 5th and 1st gear together with the bearing between them.
4. Front countershaft bearing from the case and the rear countershaft bearing from the countershaft.
I wrote a DIY showing every step.
LINK HERE