So here's a fun one. The head electrician on the show I'm currently on went through the parts list for the ETC Source 4 Pars and ordered a bag of everything. Included in this was a bag of little foam pieces that can't be more than 1/16" x 1/16" x 1/16". Here's the question, what are they for? There is no part number on the bag or this would be much easier. One side of the foam cube has adhesive the other 5 are just plain grey foam. Calling ETC guys. Thanks in advance.