A number of theories on that subject, and you're sure to hear a few. Suggestions will follow, but the decision is yours. It will depend on what's available for that model OEM wise, your skills and abilities, what you expect the finished product to look like, (aesthetics vs function) and of course, budget. Factory remote packages can run $500 to $800 on up to $2500 to $2800. Not familiar with a 2860e so I have no price quotes to share. I can state that if I were doing it, it would not be OEM parts, and would probably come in around $500 to $700 for a single double acting valve with a pair of breakaway couplers. I would not go with any solenoid valves, but again, your choice.