Richard, thanks for the info on the scanners - in my case, however, that's like locking the door after the horse is gone.
As I stated, I've already photographed the slides. Good idea about explaining how I did it.......
I'd originally used the Pentax Bellows II with a 50mm f2.0 (at f8.0) Pentax Super Takumar lens and the Pentax Slide Copier to actually hold the slide. Unfortuanately, this set-up didn't give me the results I wanted - because of the FOV factor on my DSLR (*ist DS) I was unable to get a picture of the whole slide. On a side note - I actually first tried using the Spiratone Slide Duplicator I've owned for decades but had the same FOV problem.
So, after a LOT of experimentation, I ended up using an SMC Pentax 28mm f2.8 lens (at f8.0) with a 20mm extension tube (by this time I'd upgraded to a K200D - same FOV though) and still used the Pentax Slide Copier to actually hold the slide. Worked out pretty good - final image was just slightly larger than the slide. For lighting, I used a desk lamp with a "cone" style head positioned behind the slide copier and set the camera for tungston lighting.
One of the limiting factors with all this was the slide copier - it only connects (without modifications I didn't want to do) to a lens with a 49mm filter size - I only had 3 lenses I could test with.
Anyway, interesting project - once I got all the bits and pieces figured out, I was pretty much a piece of cake. Except, of course, for the slides that weren't properly exposed or that had faded because of age.
Bid Dave, thanks for the input, I'll give the 8x10 setting a try.