Danny S:
What is the item number of your set ?
Is it the 1993 D&RG CZ set with 15" cars ?
Or the 2000 WP CZ set with 15" cars ?
Or the 2003 CB&Q CZ set with 15" cars ?
Or the ~2016 D&RG CZ set with 18" cars ?
I have the 15" sets & have never had any problems. But I have never had or used a remote uncoupled sections.
I hope other members will have feedback for you on their experiences with your specific set,