Thanks Hak, Andrew, aryntha and everybody! You've been so sweet.
Yes, the pics speak for themselves, while my nonsensical point seems to be pretty vacant. But i did try to explain something as the future reference, just in case...
I would like to have those no-good lasers back and trace the focal point myself. Let's go ahead and do something. Hak has a higher work ethnic while i has a vacant mind. Actually my thinking was to let each guy receive the unit first and try and share the feedbacks that may vary. Then if it is asserted to be problem with focusing or beam profile(i honestly) think the focusing just varies but not all fail, we would like to have it returned and get the shipping reimbursed. It seems that nobody can afford to bother to wait that much now.
Since Hak believe it might disappoint everybody, let's move on. :yh:
With all explained in detail, i'm afraid the best we could do is to cut off the extra focusing route and get the focal point to a regular and fixed position and surely probably a lot more work need do to make it better.
I also attach some pics i took with the pl-c 405nm sample in my hand. It's easy to understand.
Hope it helps clear up any confusion.
Thanks again! I'm gonna sleep and dream a good night.