Gurth

You can fold the arms upward when the clip is in place. If there’s not enough room for them to fold all the way (as is likely) you could probably let the weight of the board and the sturdiness of the table underneath push them out of the way. Still, depending on the actual dimensions of the ribs they need to go around, I have a feeling it may be difficult to find clamps that are both small enough to fit and strong enough to hold the board together.

I have a feeling there’s not going to be enough room underneath the board for those clips.

There’s an idea: you wouldn’t need a frame, just some square blocks of wood would be enough. Get a sheet of plywood at least as large as the assembled board, and cut 24 wood squares that will fit in the corners of the plastic tiles. Then all you need to do is glue (and preferably screw) the squares to the plywood so that the tiles will fit over them. It’s a bit of work and requires fairly careful alignment, but it will prevent the tiles from moving at all, and you’ll also never have any broken clips. On the downside, it’s more expense and you’ve got a big board you’ll need to store.

If you install magnets you’re limiting the possible alignments of the tiles: you can’t fit them so that you always have two opposite poles facing each other. I looked at GW’s site just now trying to find pictures of how the boards fit together, but no luck. However, Google seems to have come to the rescue. Is it these clips you mean? http://roll2dice.com/gfx/theothertalon/CitadelGamingTable07.jpg I’m trying to think of something that would work in its place … if you have plastic tube that will fit under the board, you can probably cut a slit in it lengthwise and slip it over the edges to clamp the tiles together. Other than that I don’t have any real ideas

"Why do you insist on tweaking a set of rules that was pretty decent by 1980s/early '90s standards but is now clearly showing its limitations?"