Welcome back (that is assuming you've been here before)! As a reward for your return, here is the promised Part Three of the article on the making of the effects from ST:TMP from Enterprise Incidents #17, from May of 1984. It contains some great images of the models, including one you don't see many behind-the-scenes photos of, namely the K'Tinga Class Klingon Battlecruiser.. First off, the cover of the issue...
(Click on images to enlarge; once open you may have to click again to view full-size.)
Then, the article itself, full of great photos and informative text.
Below, a larger scan of the above photo, included so that you can see more of the detail.
Another larger scan of an inserted image, I thought this beautiful painting by Probert deserved a closer look.
That's it for this time, come back soon, because I will be posting much more Trek material from this issue, including an interview with "Commodore Probert" himself! (If you recognize that reference you are a sharp-eared Trekker indeed.)
Bonus link: Check out Madman's Shipyards! Cool renderings of various Star Trek ships, including a whole section dedicated to re-envisioning the Franz Joseph Tech Manual ships in the new movie universe style.