I forgot to post, awhile back I wrote to Maxon about getting a replacement op amp for my OD-9 since I broke mine (accident while I had it open) the bottom also had the bottom sticker missing (bought like that)- must have come off when someone pulled off the velcro. THe MAXON reply from JAPAN was a demand for the serial number and that they only accept a wire transfer and the shipping was 30 USD!!! for a tiny op amp!!!! plus I needed to pay for the part!!!! That made me angry, while the maxon AD-999 is the best analog delay I have heard, I hope it NEVER breaks otherwise I fear I will throw it out rather than deal with Maxon demands and inflated prices. BTW when I replied to the Maxon salesreps email, I stated that I felt some of the prices and serial number demand were not reasonable there was no follow up.