Mid year conversion of SIMPLE to 401(k) Safe Harbor

My understanding is the mid-year safe harbor change can't be done after August 31st (assuming 12/31 PYE) because of the SH notice requirement....given the 3 month requirement for the creation of the new SH plan.

If the new 401(k) SH plan is a nonelective contribution, is a Safe Harbor notice still required ?

Thx!

I want to withdrawal my funds from my 401 k 

How do I do this