I wonder what's the difference between chain and motor driven? I have the motor driven ones on Grippa's stainless steel reels. Glad I got stainless steel ones because they still look brand new, no rust. Yes I agree that if it breaks down then it can be a nightmare unless you have a 2 man system. Last week I could only run with one reel until I changed the other ez-snap fitting.
So another big business decision is to always go for a 2 man system. Might cost a tad more but it means when one goes down you can still make money with the other one, till it gets fixed. 😉