I always glue mine still. I use a thicker glue that takes just a little bit longer to set up/ dry than my Plasti Zap, so that I can position them properly, then let them dry. Since we,re on this subject, is there anybody else out there besides me who doesn't use the Poly-caps that come in most Japanese Kits? it freaks me out to apply the pressure it sometimes takes to attach the wheels. its then I decided, You don't need them!!, PLUS, if your car isn't sitting right, it gives you more space to tweak things. that's the reason I use the thicker glue.