Source

The housing my customer bought had the thermostat holes drilled incorrectly so the T-stat housing couldn't be bolted in place. I never got to the point of running it with it. Just such a basic screw up I won't run anything else from them. Pretty much rotating kits and heads are it when I use them. Don't get me wrong - Source is good value. But good value doesn't mean "good enough" to run. You still need to spend to make them usable (IMO anyway) but overall you will still spend less than the higher price points.