I bought the 4 footers (for lifting pallets) for use with a 24 hp 2016 Branson. Mine came with the cross bar to assist in keeping the alignment but when lifting pallets, it has to be moved all the way back or removed. First thing I noticed was the foot-pounds thing. You are out beyond the bucket lip and that cuts your lifting ability to half or less of the tractor's rated output. Second, without the alignment bar, even though you push them all the way against the bucket and tighten the locking screw good and tight, theystill have a tendency to turn on you when trying to work pallets other than straight in lifting.
For picking up logs and all should work ok with the consideration mentioned. Got mine off ebay, pretty competetive price at the time...forget the number.