make sure the bolt holes for the manifold supports have some play in them and dont torque em down too tight
i still dont believe in manifold supports because of simple thermal dynamics, the support may not expand at the same rate or in the same direction as the manifold/turbo and may actually cause cracking rather than prevent it. The manifold runners, flanges and welds should be off the proper spec to hold the weight up (as well as the manifold studs).
That being said they have become quite popular, i dont know if anyones had problems with them or not.