Need advice on cover letter as an independent contractor

Currently I'm working as a contractor, but I got that position by applying to a full time job (they can't help me with relocation). Then I thought it would be nice trying to apply to some other companies as an independent contractor. But I don't know how to write good cover letter and introduce myself as a contractor. Please critique my letter and give some advice(s).

Dear [company-name],

I came across your Python Developer job advertised on your website and I found it very interesting! I would like to discuss how I can help.

In particular, as an independent contractor I can offer [company-name]:

- very experienced Python developer. My last project was [project-details]

- expertise in multiple python frameworks, such as Django and Pylons.

- strong Linux skills, including postgresql, mysql, nginx, apache administration

Please find my CV attached for your consideration.

I look forward to discussing your project requirements in more detail soon.

Yours faithfully, [name]