Questions about WR Long 4in1 buckets

[LeRoi]

I am seeking some knowledge of 4 in 1 buckets. More specifically there are two series of buckets offered by WR Long for compact tractors. The standard Hydro-Jaw and the heavy duty Hydro-Jaw. Does anyone who has the standard HJ bucket have any problems with it bending or warping under use? I don't own one yet and wonder if I should spring for the Heavy duty version when I purchase the tractor. I am negotiating for a Kubota L3830 with a 723 Loader and 72" 4 in 1 bucket.
Thanks
Leroy