Both posters in the referenced threads are overseas from US one in Ireland, one in Philippines , so likely 240v which means some different parts from NA - don't know if that makes a difference. Lew Johnson responding to the one fellow seems significant. CJ does sell alot of amps - anyone who does will have some problem cases. Of course asking around as you're doing cannot hurt.
I see eight 140 owners in AA Inmate Systems. Perhaps you could e-mail some of them for their experience? People whose gear works fine tend not to post msgs. to that effect, so you may not find threads that will prove a negative, ie. not unreliable. Is the used 140 still under warranty? Maybe the seller can share the serial # and you can check with CJ if it was every under repair. Cheers!
I see eight 140 owners in AA Inmate Systems. Perhaps you could e-mail some of them for their experience? People whose gear works fine tend not to post msgs. to that effect, so you may not find threads that will prove a negative, ie. not unreliable. Is the used 140 still under warranty? Maybe the seller can share the serial # and you can check with CJ if it was every under repair. Cheers!