there is only one print on the echo peddal.... its on the left side of it (and you probably just forgot to use the tape lift on the print to collect it
), and you can collect the loose screw from the back using the tweezers
once you have taken those 2 items from it, you can process it on the assembly table
on nother note, there is a tequila bottle in the back of the stage which has 3 prints on it, running these 3 prints will get you the humorus criminal records of the band members