The one thing that frustrates me to no end so far is putting together buildings. I've got two painted and ready to go - even put my own decals on one of 'em (and decals for the other are ready to go). But I have a heck of a time putting them together....... I use liquid plastic cement from Polly S. Any tips ??? Am I not holding the pieces together long enough. I hold them together until they support each other, 10-15 seconds, and then leave them for like an hour or so. Come back, and with just a little movement, the joint comes apart again. ACK !!!!