Well this took my brother close to 600hours.
One off for his LS swap. A combination of taking his time, stuffing up doing things twice and throwing it a handful of times.
Though I know where he made this mistakes and how we can.shorten.the time to a fraction.
Once the mold is snapped, it's easy from there.
It's always cheaper to.purchase an existing carbon unit to suit the DCOE, however they almost don't fit, so custom fan is sometimes the best/only option