If you are worried about the life expectancy of your 90-70 plc parts than you need to know Qualitrol.com. The website is run by Qualitrol International who since 1992 has been the world wide leader for PLC parts. A lot of companies are panicked that their system will go down now that GE has decided to dis continue the parts. No need to worry because qualitrol has thousands of new and re manufactured parts in stock. All the parts ship out from Qualitrol’s warehouse so they get to you fast any where in the world. Trained certified technicians can also repair any part you have, or help with trouble shooting right over the phone.