Need a help on F4 I-130 application

[h1busa]

Greeting All,

My sibling is US citizen & filing my GC under F4 category

I'm in US working on H1B for more than 8 years
40+ years & married living with spouse, 2 kids. kid-1 is Indian & kid-2 is US Citizen
I applied my GC through present employer:EB2-India(I-140 Approved) with PD Feb/2010

I would like apply F4 through sibling & go out of the country for few years & get GC though F4 while out of country

In I-130:
What should I put employer & job details at#15
Should I include my US Citizen kid details at#17(List spouse & all children of your relative)
In the future can change AOS to Consular Process at#22(when I move out of the country)
While I'm already in EB2, can I apply F4
If I decided to come back, then can I apply H1B & GC through employment & I retain older PD:Feb/2010(EB2 category)

Highly appreciated your help and suggestions

Thanks

[immihelp]

1. Put your current job details.
2. Yes, and mention that the kid is US citizen.
3. Yes.
4. Yes.
5. No.