DoctaDink, I had the conversion done by Nikon when it was free. As I recall I sent the lens to a city on Long Island. I'm drawing a blank on the name of the city. An interesting side story, I lived in New Jersey in 75-76 and took a trip to the Nikon HQ to see what I could see. I remember being a little let down. I think I was expecting to see every lens and body in a showroom that I could try out. It was a customer service counter in a business location and rather dissapointing.
Anyway, back to your questions about the lenses. I haven't taken the 18-200 off the D-200 since I got it. It is my Take It To Work camera. I am a photographer at a tv station and if we are not shooting video for the newscasts we are shooting still images for the web. I wish the 18-200 was like the Fujinon on the video camera 15:1 zoom and F/1.4. but then it is a $18,000 lens with a built in 2x converter. Since I work 3am-Noon, I keep thinking about bringing one of the 1.4 lenses but for what I am doing the 18-200 is a great lens. When I'm not working and I'm out getting Moose or elk or mountain lions in the mountains then I usually have the D300 and the 170-500mm. The 18-200 has VR also so I can usually get some decent images in low light by boosting the ISO. In a breaking news situation in the wee hours I also carry my SB-800 flash with me so... My web kit for work also includes a Sony HDR-SR11 High Def Hard Drive Camcorder. If I am starting at a breaking news location on my way to work instead of stopping by the station to get the station's video camera then I use the little sony. I keep a still tripod and a video tripod in my Denali just in case. I then transfer the video before the newscast begin. Whoa look at the time. I'm off to bed.