Is it possible to perform this continuous trick smoothly? I can't catch the pen near the tip of my fingers after TA extended.

I think the charge wouldn't look good, but yes it's possible to do this combo continously.

edit: just practice Extended TA so you'll be able to catch it where you want.

I can do smoothly Ext TA > charge rev 12 continuous, but only if i use Kam's style ext ta

there was a video about some guy who showed the two fake doubles, one being linked to a rev charge, the other linked to a normal charge.

And the palmdown variation links extremely well. i don't know what your talking about unless you have not mastered the trick yet.