Custom manifold/plenum/TBs

ViCiouS

So, I've owned the Z not even a year and have already come to the point where NA options become very limited. I don't particularly want to go the FI route, and cams are not only expensive, but don't have proven results (in the States), and would be a pain in the *** for the entire process. Next logical option: intake manifolds and TB. I've read through the majority of threads I can find on the topic. In summary..

1 - Kinetic made a flashy looking, but ultimately failsome manifold due to no testing or airflow mapping.

2 - GTM has the GTR conversion option, but we know how that business is going right now. This required new fuel rails, cutting intakes, and a new strut brace anyways. The primary advantage to these are proven power handleing on the GTR.

3 - Synolimit is porting stock parts, but we are awaiting his dyno results.

4 - JUN has BBTBs for a ridiculous $2 grand, and there are a few manifold prototypes, but I don't think that ever reached the US or production.

5 - Mine's TBs for $1.5k, again rediculous

6 - Z1 bored stock TBs (62mm vs 60mm stock) At $900

8 - GTM's manifolds, require custom intakes/TBs which were on 1slow370's Z: HERE

9 - Z1 and Motordyne plenums, seem to be minimal impact throughout the powerband, just a little higher HP for Z1 at the redline and motordyne has slightly more torque throughout. These are simply modified stock plenums.

I've got access to CNC, 3d printing (option for plenum), and working on access to a flow bench. So i'm basically looking into the cost and power benefits of actually designing some of these. I plan on creating some CAD/Solid Works designs over thanksgiving break when I have time to get all measurements on my stock parts.

In the mean time, I'm open to any suggestions/advice/constructive criticism. Are there any options above that I'm missing? Also waiting on synolimits' results to see if this is even a worthwhile project.