[Shop-talk] Cable assist for car trailer ramp

[Steve Hammatt Mount Vernon WA USA]

Hi
I've got a 24' enclosed car trailer.  It's got 
cable assist (both sides) to help with opening 
and closing the rear ramp door.  It appears to 
be similar to the horizontal spring used to assist 
garage door openers.  Is anyone familiar with 
this use and know of the most common supplier? 
I'd like to increase the assist but wanted to 
review the procedure before jumping in on this.
Thanks.

Steve Hammatt
Mount Vernon WA USA