I did the 4000+ also
On my 97 H 29.5. Installed it myself last summer. Did involve a fair amount of work to fit ti the console, position head and drill hole to acomodate it, etc. Measure twice, cut once is a minimum. Make sure it clears the steering chains, other walls in the console, etc. Still fine tuning the settings but love the ability to let go and relax, adjust rigging, raid the fridge, single hand, etc.