I just got done hooking up my new 36 x 18 x 12 (I changed my mind at the last minute and went with this instead of the 24x24) Rimless frag tank and I must say I'm very impressed! It only cost me $240 with tax. The bulkheads are standard quality. If you break them its because you overtightened them. You should be able to get a tight seal with just tightening by hand.
Anyway, the quality of the build is impressive for the price. Plus the overflow is adjustable, which I really like. The stand pipe kit is very quiet and can handle a lot more flow than I'm currently throwing at it. Very happy with this purchase. If I ever need a larger frag tank, I'm going to stick with this brand for sure.