I'm at the beginning of gluing up a couple hundred small organ pipes. My regular clamps seem to do fine with the bigger pipes but with these little guys (3 to 8" in length, 1.5 to 3 cm on a side) the twist from a C clamp or the slight movement of the pads relative to each other with the Quick-Grip type clamps that are very convenient for this sort of thing push the parts out of alignment by a half or full millimeter. They can also introduce a slight racking, despite an internal spacer block. I'm wondering if there exists a very small, parallel action clamp that would do better for this task? I need to be able to clamp in two dimensions at once, gluing the sides to the back and foot block to the back and sides while maintaining a precise internal dimension, which precludes a number of ideas I've had. It would be great if they were not too expensive so I could afford to do more than one or two pipes at a time.
None of the tricks I'm used to using to keep glue-ups aligned seem to be applicable with these tiny, thin pieces of wood.
I'm tempted to try hot glue and just hold them by hand until the glue sets up, but I can't have any squeeze out on the inside corners of the pipes as that would interfere with the stoppers, and I haven't figured out how to quickly apply hot glue with that level of control. Using Titebond I apply a thin coat, smooth it off with a finger, and then squeegee what will be the inside corner with my finger so there's very little glue close to the edge-- hot glue would gel before I got that done.