This is the equipment I use - some of it is interspersed with wood chutes 6 feet high and topped with an 8 inch rail.
http://www.hi-hog.com/
I like this equipment - it is robust - in the 6 years we have used it I have not had to make one repair.
That in itself is important to me - therefore I have no idea on how they are at warranty work - I have never called them.
They will develop your system from scratch if you want them to.
Tub and sweep is good - can be run by a kid. Solid side sweep is the ONLY way to go.
Solid side chutes are great for running into the squeeze - no balking or gawking.
I do not have solid side chutes here - when we upgrade that is the direction we will take. Makes the operation run smoother and faster in my opinion. When we upgrade we will also go to the adjustable chute width - one system for cows - then shrink it up and do the calves - no turn-arounds!
Bez>