Here are three important needed products for any dredge set-up when using a short dredge rod and an expensive electric reel.
A Stay Line is used to take the strain off of the rod & butt gimbal and the pin in the rod holder. Attached to the rod by way of a loop and then secured to a forward cleat etc. Made from 3600lb Dyneema which is soft and supple does not become stiff when exposed to the saltwater etc.
A Safety line, also made with the same Dyneema is attached to the reel base and protects against the rod & reel from going over the side.
A pulley set-up is used when using and exceptionally large dredge and too much for the electric reel to overcome the increase of drag pressure. When using the pulley set-up, the power requirements needed to pull the dredge is reduced by half.