Just a few questions with LTFT tuning


I have been following the forum for LTFT tuning and have set the O2 switch point all to 450mv

1. I want to know when i have finished do I set the O2 shitch point back to the
original settings or leave them at 450 mv

2. What is the purpose of setting the O2 switch point to 450mv, What is the problem with tuning without changing
the O2 awitch point

3. After tuning using this method i find the the VE table cell numbers are very low is this normal