I've used Robart hinge points pretty much since they came out and have never had one fail. I use yellow glue and make sure the hinge is coated by rotating the hinge point while pushing it in, then make sure they all hang stright down after I get them pushed in. I seal the bottom of the serface hinge line and make sure they are free. I use the 1/8 for 40/60 size planes and have used the small for an electric Super Sportster and use the big ones for my gasser. If the trailing edge is not very thick, like 1/4 squre, I put blocks inside the trailing edge to re-enforce it. Make a hole all the way through the basla to let the glue go all the way in without creating pressure inside the hole and gives the glue some place to go. Make sure the hinge point is well covered with glue and it will never come out without breaking the balsa around it. Like I said, I have never had one fail. On foam core wings they work great. I've never used one on an all foam wing, but I see no reason they would not work with them as well. They are just as easy to put in as CA hinges and no mess like ca. At least if you get any glue on the wing or your finger, all you need to get it off is a paper towl and maybe some water. Can't say that about ca. Have faith in hinge points, they work great and make for a very free surface.