<p>Regarding the clips, i was thinking of screwing metal ones in, or else use some little springs and a plastic windows to press the slides in place. If the objective is to hold them tight against the holder wall, tension should not matter too much.<br>
I understand that the exact positioning of alignment marks is crucial, but did not realise that a slight offset could damage the scanner. Anyway, without the holders the scanner is essentially worthless, and i do not even know if my specimen is actually operational -- so i am willing to risk that. If the scanner can be made to pull through and scan a 3d-printed holder, i figure we could scan marked paper to know the correct positions for the slides and adjust the model accordingly.</p>