With respect to the GB4000, I was using one for 3 years up until I received my beanish in June. I have converted a small number NP's scripts to execute the GB4000 - very time consuming in the programming and root causing diseases. GB4000 programming is very limited and the carrier frequency is hardwired. I've packed up my GB4000 into its case. I have not regretted the purchase and NP's generous contributions have taken me to the next level.