Question about TQ secondary operation

I am a TQ fan, have used them since the 70s. Have a couple of Comp Series 850s & lots of production models. TQs were used on Aussie Ford 302 & 351 engines in the late 70s, all are 9000 series.
The question I have is about the sec discharge tubes, which are the same shape/size on the Ford carbs & Mopar TQs; bullet shaped tip with a small hole & various holes of different sizes along the length of the tubes. Size, position & number of holes can vary with carb model.
The question below I have asked on a few forums but have never got a credible answer.

[1] What is the significance of the hole position?
[2] Does the position mean that, as an example, the upper holes deliver fuel before the lower ones? Or the other way round?
[3] What determines the hole size?
[4] There is a large variation in sec jet size, with the same air bleed size, on Mopar carbs from 0.125 - 0.143". Blade opening & AV fully open is the same, so that does not explain it. Odd.
[5] The Aussie Ford TQs had a 0.029" sec high speed bleed, compared to 0.039-0.040" for Mopar carbs that I have measured. Some Ford TQs came with 098 sec jets, smaller than the 101 primaries!! Go figure. No wonder they got dumped for Holleys! The AV shape & WOT position & sec WOT blade position is the same on Ford & Mopar carbs, so that doesn't explain the very small jet size. The smaller HSAB might have some impact, but the area of of 143 is more than twice that of 098, so seems a big leap.