I've done a few events outdoors this summer and have found an issue that I wanted to get some opinions on. Uneven ground... If I run my tops over my subs, no issues. I've gotten some blocks to level my subs, so the tops are therefore level as well. If I just run speakers on poles, I have issues. I know there are poles out there with adjustable legs so you can level them out. Does anyone have any of these that they really like or would recommend?