for anyone interested, here is the driver side turbo bracket fabricated by
RealAutoDynamics
This braces the turbo to the block, so the turbo is not just being supported by the manifold runner itself. The guy who made this knows his sh!t but we have no way of knowing 100% if this will prevent cracking long term, at the least it should prolong the life of the manifold. If this cracks again I'm switching to the shops custom manifolds (they have built their own TT kit which should be announced in 1-2 months).