Hi,
Thanks for placing an interesting job. I'd be more than happy to work with you.
I have 7 years of experience in shooting and making videos, among them are also tutorial ones; I will provide script, videos and voiceover.
I'll start with making a video (screen capture) where I myself, as a user, go through different stages of using the product. After that, I'll make a script where I cover all stages and troubleshooting I encountered myself (or extra possible troubles that may arise). Finally, I'll make a voiceover according to the script and edit the footage in Final Cut, making a finalized tutorial video.
Feel free to contact me for any details you may find necessary to discuss.
Best regards,
Nick