I provided installation services to an IL dealer on a project done in MN with an invoice date of 4/12/18. Turns out the dealer has been paid for 90% (Materials, freight, installation). The end user (State of MN Historical Society) is withholding the 10% which I think is what the dealer was going to use to pay me for my installation services. After talking to the Director of the museum (since I cannot get ahold of the dealer) I have learned they are going back and forth about a small amount of accessories not included on the order (about 2500.00). I believe the end user is correct in withholding payment due to the fact that the missing accessories are specifically included in the proposal that they signed off on. I do not want to file a lien against them (MN), but rather the IL dealer who is in breech of contract with the customer and whom I contracted with to provide the installation.