This isn't really a how-to but someone asked how I attached the legs to my giant spider. I finally found some old photos . I started with a board and drilled holes for U-bolts. The legs use 45 degree and 90 degree elbows. Once I positioned them I cranked the bolts tight. Here's how they used to look.
What it looks like now. I added a fiberglass body, great stuff foam over the board and monster mud and burlap to make different thickness for the legs.