This is a super sweet set up. I have a Bush Hog PHD that is set up for hydraulic down force but I couldn't afford the hydraulic set up. I have used the hydraulic down force with a rented skid loader and PHD. The hydraulic down force makes the job so much quicker and easier.
I have run my PHP for 3-4 years without it and it really is dangerous to be jumping up and down on it trying to get it to dig. I hope this addition helps solve that problem.
D.