Change of employer before I-140 180 days window closure
TL;DR: Should I wait for an additional month at the current company to finish 180 days, when I have a strong motivation to not to wait?
Situation: Have approved I-140 but 180 days window not completed yet - would be around Aug end. Have got an offer from another employer. H1B transfer is expected to be completed by the end of July.
Now, I know that the safest path is to wait till Aug end but my joining date will go in Sep. (Resignation in Aug End + 2 weeks notice period)
My new employer might be ok with waiting.
However, I want to join asap new company because:
1. Current manager is going on leave for a very long duration (>3 months) in Aug end - after my 180 days end date. He is counting on me for certain things. I feel like putting papers right after he goes on vacation might irritate his manager. If I resign before he leaves, he might get enough time to arrange for someone else for that work.
2. Super excited about the new opportunity. It is in early stages of conception and design phase. Would like to be there during that stage.
3. Financial loss - might lose out on some benefits in new company joining this late in the year, plus my new TC>>my current TC. So, every extra day I spend here is significant loss
Considering all this, should I resign right after H1 transfer is completed?
Whats the minimum time the company would take if they decide to withdraw? (Basically trying to decide if I at least save on some days)
I do understand significance of 180 days window, especially when I am pretty close. But considering above reasons, am I thinking whether that risk is worth taking?