My head is spinning.
Well that's not saying much, is it Mr Smith? Your head spins at even the minutest deviation from the Warren Report bedtime story.
My head is still spinning by your idea that a random hoaxer was in a position to write Mr Oswald's name and the fake 'West Nassaus' address in a convincing imitation of Mr Oswald's own style of handwriting. Like I say, if it weren't for the timeline implications (foreknowledge of motorcade route) you would not be putting forward such a silly explanation
Oswald is concerned about someone monitoring his mail to discover a large paper bag. And he tests this by sending a smaller brown paper bag to a non-existent address?
Yes. To see if it finds its way nevertheless to the Paine residence
Even if someone discovered a large bag in his mail - so what? Why would they conclude it was going to be used to carry a rifle to assassinate the president?
Mr Oswald is paranoid about surveillance. With JFK coming to town, he fears that an odd parcel containing a long (rifle-length) paper bag could easily raise suspicion with the authorities. He is being extra careful
All of this when he has the obvious solution of just taking the bag there himself when he goes (which he did)?
Really? Where on his person was it when he travelled back to Irving with Mr Frazier on the Thursday pm?
Why mail it?
He doesn't want a fellow employee to see him taking (i.e. stealing) TSBD property home from work--------------especially not when said employee will be seeing the same paper bag the following morning and being given to understand that such was needed to carry mere curtain rods. Much cleaner to have the bag there waiting for him when he arrives at the Paine home on Thursday pm.