Improve your triangle by accessing the QL "hip hiker" muscle. When you run or walk this muscle helps your hip lift up. This stretch helps with hip pain. Ideas for stretching for lower back pain as well.
The original Bullworker is more than 30 years old. Whilst the newer Bow Classic is more pleasing to the eyes I still prefer to work-out with my original model. Or perhaps I should buy the Bow Classic and store my original for my grand children.