I have 6 Groundwork brand tripod sprinklers purchased from Tractor Supply. A constant problem for me has been that the tripods have a lot of free play and they are frequently tipped over by water pressure, even damaging a few of the sprinkler heads.
The tripod frames are each held together by nine bolts and nine 10mm acorn nuts. I had assumed that being closed end acrorn nuts that they were already bottomed out and were as tight as they could be. I was wrong. Each nut had around two more turns available. It was like the tripods had been assembled with all the nuts just finger tight. The tripods are much sturdier after tightening all these nuts. It remains to be seen whether that will help the tip-over problems completely but so far, so good.