Damn, connection expired, and then RCU ate my post. Thank you RCU!
Plastic, thanks for that video link. It makes my decision to swap out the stock tracks for lengthened Pershings that much better, as the guide horn is near-identical to the Tamiya Pershings. The other reason I wanted that track is the track cleat is much better.
You only need to add 6 links to the Pershing ones to fit 'em to a Leopard or Gepard, so if anyone else considers it, no need to blow for a whole second set of Pershings, I have spare Tamiya link sections available. You could also use the Pershing tracks from a HL, but you'll need a few links more, 'cause the HL links are a fraction smaller than the Tamiya ones. NOTE: Sherman links will not work, the guide horn is too wide to fit between the roadwheels.
For the turret MG, you might try converting the Verlinden M60 kits (2 per box) and then moving the trigger grip back, and altering the stock. Its that, or beg Verlinden or the Germans to do one from scratch. I've looked for some FM MAG 's (the original designation of the C3A1/M240) in 1/18, no luck yet, but if I fond one, I'll let ya know.
http://www.sfu.ca/casr/index.htm has a lot of good articles on the Leopard and other CF armor, especially my favorite by Matt Fisher.
Happy Holidays everyone!