My Walking Dead has pegs like this. It's been a while since I had that playfield out and had to ram it back home, but the key operative word here is "ram". From what I recall, you grab the pegs and slide the playfield back into the cabinet, then all of a sudden, the playfield encounters resistance and stops before it gets all the way back, and you're like WTF? Well, the playfield has just encountered a small bump in the rail system, and you have to ram/shove it past that little bump. Yeah, it feels pretty violent, and not like something you really want to do, but I guess it was designed like this. I had a friend who had Stern games from this era on location, and I asked him about it and he was like "Yep, I just ram them back them back into position".
On my Sterns from this era with playfield brackets instead of posts, I'll let the brackets rest on the front of the cabinet and I'll grab the back of the playfield and front of the playfield at the same time, and I'll lift the playfield over this bump and slide it back slightly, then go back to the front of the machine and slide the playfield the rest of the way in, as I hate the feeling of ramming the playfields home. I need to brackets from Pinball Life for my Walking Dead. Those pegs suck.