^Do you know what parallel is? lol. Rotating a picture would make it vertical, not parallel. Don't use 2 ash catchers. It really not needed. And its a bit hard to get the ashcatcher to sit straight on bongs like this. The angle of the joint is always going to be around 45deg but not exact, therefor making it hard to get an exact parallel with the mouthpiece. Though to be honest, you would want the trees to be inline with the downstem so when you lean the bong to hit it, both percs are sitting vertical. I would try getting a 90deg ash catcher. It may look weird sitting on there, but in use(when its leaned back, how most hit beakers) the percs will function to their full potential.