Welcome to the forum!
Glad you found us!
I haven't had trouble with any of the welds.
I started with a B2910. no troubles at all with it.
Traded it for an L3400 several years ago. I've had two hydraulic hoses go bad on it.
I bought a BX2350 for my wife to use around the horse barn two years ago. Had one problem with it, the transfer case that transfers power from the pto to the mower deck seized up when it was 4 months old.
Maybe someone will come along who's had a problem.
Jim