The welds on my f2 frame looked shocking on the top seat part of the frame. One of the supports was supported by two single tac welds!
most chinese frames crack... if not all.. just find a good welder and you should be sweet for a couple months
I don't think we've cracked a lucky7 a/c yet but morty cracked his l7 w/c... so they can break..
bending swingarms out of shape would be more of an issue with lucky7's
