Looks good, Dan. How do the Zap Caps compare to the Zens?
Good question.
The tube size and bushing size are the same. No problems there.
Of course the clip is different.
The finial cap seems to be one solid piece, if this is the case,
you lose the ability to flip the orientation of the pen which may or may not bother anybody. Oddly, it has internal threads. Not sure why.
The refill is unmarked.
One thing that I noticed is that the magnet is substantially weaker than on the zen. I wouldn't say that it's too weak necessarily, but it's noticeable certainly. The zen magnet may be too strong for some peoples taste. I don't think the cap will come of easily accidentally, but if I try to forcefully, I can fling it off.
Overall the kit seems decent. My subjective thought is that it feels like an 'apprentice' kit from csusa. Kind of like the difference between a Jr. Gent 1 and a Baron.