Suggestion for a leg and arm extensions tutorial

Hi there! I've taken all of the monster suit building webinars and they are super inspiring! However, I have a lot of projects that I want to do that would require leg and arm extensions, but it's difficult to find really good information about creating them. I tried to make some before and they didn't work out too well and with the weight distribution of my costume I couldn't use them. So if at some point we could get a tutorial or webinar on leg and arm extensions it would be awesome!