FBA*: First Time's A Bust

I am following the rulez. Swear! This is what the instructions tell you to do.

I can see I may have to stop posting about sewing for a while because every fucking new thing that involves boobs and catering to their voluptuousness seems to be failing. I mean, everything seems to be providing me with a great learning opportunity.

I mean, totally fuck that. What am I, a grade 1 teacher??

Thing is, I'm happy to bitch about this ad nauseum. It strikes me, however, that you may be vaguely irritated by my constant irritation.

Here are my questions du jour - aimed at the sewists but pls, anyone and everyone must provide feedback:

• Have you done an FBA? Did it work the first time?
  
• Was it the Y variety rather than just the normal one?
  
• How big a centre gap do you think you can you accomodate with the regular FBA (not the Y version)? I think I have to add 2.5 inches - is that too much with the regular version?
• Have you struggled with the apex going too low once you make the adjustment?
• Have you struggled with the back being shorter than the front at the end?
• With a narrow back and large chest, do you find that the number of inches you need to increase the pattern by is actually smaller?
  

*FBA = Full Bust Adjustment. It's designed to make woven and, to some extent knit, patterns (which are cut in general for a 34B chest) perfectly fitting for any woman, regardless of chest size. It's a fairly common - but not insignificant - technical alteration.