i just received a call from josh from armada tech., the pro 600 that i loaned the pros is being replaced with a pro 700. i bought the pro 600 as a backup to my 521 the first year that they were available, the machine came to me with a glitch of sorts which i reported to pro tech. bruce gave me a return number and i got busy and forgot about sending it in, my fault totally. when mike leary said that they were doubting the working condition of their 521 i sent the pro 600 and an explanation of the glitch to russ, he in turn found the "stealth solenoid" using the 521 receiver and the 600 transmitter. bruce offered to look at the 600 and man, today josh informs me that they are replacing the 600 receiver with a 700 receiver which will be shipped to the isle of bainbridge on monday. it's not often that a company will step up to the plate for a customer this long after purchase, it may have been that i never put much time on the locator or that i have always been honest about the transaction. this was my fault not theirs. i am very grateful to bruce and josh from armada, not only for going overboard to make this happen, but josh went the extra mile with his testing of the receiver, even going to the engineer in california about the problem. josh also told me that he had no field experience locating so i told him to take the unit home and work with it over the weekend, if bruce is available i think he'll work with josh. hands on experience will make him a better troubleshooter. i would never hesitate doing business with armada and even though i use the 521 most and have talked to david lopez from tempo-textron a number of times, i got to like a guy that answers his own phone, bruce does. i hope that russ takes advantage of the pro 700 and has his 521 factory inspected. hell, he might even buy a 700, and mike will take the 521 and fund his next road trip with mini seminars. in closing i would really like to thank the crew at armada for what they have done for us, i'll never forget it.