Building a Bracket T-Jet

I noticed your question and think it's a great question.
There are many others here more expert than me, my answer is based on instinct, not necessarily tested knowledge.

One thing that does strike me ........whatever goes into a good racer applies pretty much to a good bracket car. If a car is well balanced,. everything round and square as needed (if you get what i mean) it will go a long way to consistent running.
This next is a guess, but I am thinking a car WITHOUT braid pickups might be a good choice as adjustment of braids can be fussier than regular shoes from run to run.
Tires bonded to wheels are a must, as slippage isnt likely to be consistent.
Notched Brushes (if it's a T JET type) not only seem to make more power but should help with consistency as well. If not notched brushes have a tendency to spin within the their housing.
Good traction and good wheelie bars are a must I would think...as burning rubber isnt likely to be a consistent factor from run to run, nor is the bouncing, on again off again power to the pickups you get from mini wheelies.

Anyone else have ideas to offer??