No one has profited as much from the meteoric rise of 3-D printing as 3D Systems (NYSE:DDD) chief executive Abraham Reichental. And in December he finally cashed in some of his winnings.

According to a Form 4 disclosure, Reichental sold 25,000 shares at a weighted average price of $80.91 for more than $2 million in gross proceeds -- an impressive haul but also nothing to be concerned about, Fool contributor Tim Beyers says in the following video.

Why not? Reichental only parted with just 1.5% of his position, which as of this writing includes more than 1.6 million shares. He also rarely sells. In fact, he sold just a week after collecting 125,000 new restricted shares that he could acquire for $1 apiece on or before Feb. 3. Add it up, Tim says, and you've nothing more than an executive enjoying a small portion of the fruits of his labor.

Do you agree? What are your favorite 3-D printing stocks? Please watch the video for Tim's full take and then leave a comment to let us know whether you would buy, sell, or short 3D Systems' stock at current prices.