My point is that the difference between the needle lengths is 3mm (as measured by Deuce), or .11", or less than 1/8". That is not a lot and therefore do not stick down into the jet much further than the stock needles.
Also considering the OD dimensions of the TBS needles is less (more taper), an unshimmed TBS needle will produce a richer main circuit.
For grins, I did the differences between Deuce's data points
TBA ---- TBS --- diff -- " conversion
2.48 --- 2.44 -- .04 --- .0015"
2.48 --- 2.44 -- .04 --- .0015"
2.46 --- 2.42 -- .04 --- .0015"
2.42 --- 2.39 -- .03 --- .0011" -> (I suspect an anomaly here)
2.32 --- 2.27 -- .05 --- .0019"
2.21 --- 2.16 -- .05 --- .0019"
2.12 --- 2.05 -- .07 --- .0027"
2.07 --- 1.92 -- .15 --- .0059"
1.98 --- 1.85 -- .13 --- .0051" -> (I suspect an anomaly here)
1.91* -- 1.70 -- .21 --- .0082"
--------- 1.60*
* = tip
