Can I retrofit a slider control box into a kevlar Boreal Ellesmere?
I'm not sure if this is 100% possible. But I think the Ellesmere (disontinued model and the current factory doesn't even build them so they don't know much about it). takes a yellow spectra rope that goes up the dial. Some of our other Riot Kayaks also use the spectra cord but it's connected to this slider in a skeg box control.
This instructional article and video may help, I'm not sure.
Hope this helps