probably should have posted this a bit earlier, but here goes... I have 3 sign posts to install & have never used these square tubes with the 2 sleeves, but I want to provide the breakaway functionality that is present on other traffic signs in this subdivision. I saw one video of someone using some hydraulic tool that beats the post into the ground, but I don't have access to that. I know i can just dig a hole, drop posts in, and backfill but I have two concerns about that. First, I know i can replace the dirt alone (plus a strategically placed rock or two) & in many field conditions this can be quite secure. The concern here is the same as my larger concern with possibly adding concrete (if i find the need for it) as well, and that has to do with the possible need to replace a sign post. I understand the anchor(s) should be able to withstand the impact of a vehicle breaking off a sign post, and the anchors would remain in the ground, however the bottom of the sign post needs to be extracted, so even the packing down of dirt has me wondering about tips from any breakaway pros... but the concrete issue is even more challenging. I'm certain I don't want concrete flowing into the holes of my main square tube, so I'm at a loss how to best secure the anchor, first, leaving an easy path to drop in the long heavy signpost after. I'm imagining wrapping some vinyl or duct tape, or something in between that can easily cover all the holes on the anchor post, with tape strong enough that weight or pressure from concrete wouldn't push in the holes all down the anchor post sections. I found a pic online, showing my same set of materials. My 10' post outer dimension (2"x2") fits inside a larger 36" long anchor. The 36" anchor fits inside an optional 18" sleeve. (as in the SSPI-02 drawing below) This neighborhood seems as though it might have some very loose soil, judging from a number of signs that are, or have been loose, leaning, or bent. I've never needed to dig there before, but plan to bring digging tools, as well as water, Quickcrete & buckets, just in case. If I cover the holes on the bottom 18" of the longer 36" anchor section, I'd like to believe that could be secured nice & plumb and then drop the other 18" sleeve on (or not use it) & finish with just dirt. This is the best idea I have so far, but if anyone did this already with concrete especially, I'd bet you could give me a few tips... Thanks in advance (I'm leaving around 11am Pacific Time, but I'll check here first!