Here's my process for both small and medium/large format:
Since recording those, I've changed to an 85mm Rodagon enlarging lens for digitizing. The results are significantly improved and truer to the film. Also, that makes getting a frame reduction to fill the APS-C sensor size easier. I also added a tube of M42 macro tubs (with some step-up and -down rings) to close of the space between the front of the lens and slide holder. This improves image contrast. Lining the tubes with felt eliminated the very minor hot spotting issues I've have on exposures longer than 1/4 second (for very under exposed slides or overexposed negatives.)
Here are some recent results:
One nice thing about digitizing with a DSLR is that you can pull it back a bit and keep the image frame if you'd like.