[sassan]

Yes you did it a good job.
Good advice here and specially Clive's.

The good thing about photoshop is that you can make same thing in many ways and once you master a few tricks here and there, you can navigate yourself, analyzing and utilizing the power known to you.

My easy way to deal in the same line is:

1- All same important points in making the images without any move of camera or change of light.

2- I additionally to what you have done, will add few images in very late or very early phase of leg movement, say if start is at 1 O'clock, on 2,3,4 etc with longer shutter time, narrower F number (Keeping total EV exactly the same with no brighter or darker image. These will add that flow of leg with blur of motion and sense of 4th dimension of "Time". You get the idea?

3- Now to the PS; In the same line, my suggestion is to have your base line image in lower most layer. My always next move is: A together push on "control" + "J" bottoms to make a same exact layer copied and created one layer above (Keeping a lower, Safety / Comparison layer), now I would click several times (As many as you have the other images with leg in a different locations) on the "Create a new layer" icon. To say 4 times here in our eg; Look at figure below, the "Red" arrow pointing to that icon thus creating 4 new layers.
You see the new empty layers: Green arrow area from Layer 2 thro 5 in this example.

4- Now I will open each extra movement images one at a time in the same order I took, say 1:00, 2:00 O'clock etc. Once one is opened, I push "A" along with "Ctrl" bottom at the same time. This selects entire image. Then push "Ctrl" + "C" together to copy. Will close this movement image. Back to original layers, after selecting (Left mouse click on say layer 2 - Green arrow area- so that it is highlighted blue meaning we will be working on that particular layer now), I go to image field and click then push together "Ctrl" and "V" bottom that is Paste image mode.

5- With "Erase" tool selected (from left side of screen), sensitivity 100 %, brush size as appropriate, I will erase the area where other legs are to be seen. You can come back to this layer later on and work as needed. Make sure not to erase the current leg that should remain intact and well seen.

6- Repeat this for every other layer, steps 4 and 5, so that all images are in place.

7- Will go to each layer for a final cleaning as needed.

8- Change the Opacity of each layer as make the final image better so that some of the legs are less visible that others with lower opacity as you see in your original image eg.

9- A deep breath. Saving the large image file in PS format in case I need to work on it later on (Hopefully not) and Flattening the final image, saving it as JPG after making the needed Control, brightness, sharpness changes according to your taste.

Looks complicated but believe me it is very easy to follow and once you do it a few time you can do all the post processing in a few minutes at most.

As is, my suggestion for your current work is to add some motion blur leg movement images as said on top of paragraph here and also to play with Opacity of each layer to get your desire effect and adding a different dimension to image.

Have fun.