but everyones different so if its worth it to you to do 4cm then that is your preference
that's why i wrote the above caveat about it being a preference
Please don't twist my words. I never said it "wasn't worth it" as an absolute (i never made a "conclusion" about what is "worth it"), i said it was the "general consensus".
What is "worth it" to every one is different, that's why I worded my statement very carefully.
The "general consensus" is that under 5cm isnt worth it, individually it differs of course. Someone can find 1 cm increase "worth it". That's fine. But the "general consensus" is different, which is fine too. Anyone can lengthen as much or as little as they want as long as they understand the trade off. It's an extremely individualized thing and different for everyone.
In general with LL you need to balance the risk and reward. But for everyone it's different what risk they're willing to take and what reward they require for that risk.
Thats why some people lengthen 5 cm and some lengthen 8 cm. Its their risk/reward preference.