back for more help.

I've been referring to trannyman's how-to, but its for off car. Made it to the part where he does not have pics for on car, and I could use some more direction.

I tried to insert diff into internal ring gear for about 20 min, & couldn't get gears 'lined up'--seemed impossible. decided, what the hell, put car in Neutral and had planetary gears in internal ring gear in about 1 min. but the output was no where to be seen....

I noted I could rotate diff carrier and planetary gears turned in internal ring gear. I noticed I could spin pinion gears, then if I wiggled it just right the diff slid in slightly more, to where outer face of plantary gears where nearly flush w/ outer face of internal ring gear, and I could no longer spin pinion gears.

I Think that means the outer output shaft teeth are set in diff and compression ring is doing its job. & this is the part where trannyman says a 2nd person needs to hold the driver's side cv axle tightly while you tap in diff while keeping gears lined up...

I thought when I got to this point it would make sense, but I seem to be wrong every other step. S0,

1) should I remove diff and start process over, since trannyman says hold driver axle AND tap diff in?

2) what gear should I be working in?

3) when I get the calvery here to hold the drivers cv axle, does it matter if hub nut, or even wheel, is still on drivers axle?

4) before i start hitting my new diff, how do I KNOW gears are all lined up?

I appreciate all the help.