As I was working on my lastest Intarsia pattern, I did some experimenting with duplicate stitches. I found that when it comes to “smoothing out the curves” most of the time I only needed to cover one leg of the stitch, NOT BOTH. This “half” duplicate stitch does not add a lot of bulk to your project, as does crocheted chains or regular duplicate stitches, and it retains the intregrity of the knit stitch.
Below I have illustrated the process. Give it a try.
You begin as you would for a regular duplicate stitch, bringing your yarn up through the desired stitch. Next, follow the green arrow, sticking your needle down over the bar, and pulling your yarn through to the back between the two stitches on your right.
Here you seen the results.
Work in the opposite direction, if you want to slant a half duplicate stitch to the left.
Below is a photo of the results in the real world.
Happy knitting!
Knit-tweaker
Creative Knitting - Beyond Knit and Purl 
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