I run all mine laminated. Some claim this will make them slip off the foot...LOL. NOPE! Reason I run them this way is because I'm on a 2 day check and often times have to hold them on dry land...as it is impossible to drown them as the water is too shallow. If you've never seen the catch circle from a 70 pound beaver ... it'll impress you! I use the laminations specifically for critter comfort. I have both the factory flat bar style and most I just laminate myself with roundbar.
Check out these pics. All are MB 750 laminated. Give you some idea of why you are hearing so many recommending them.
Front foot hook up.
Both back feet.
A thumb sized stick in a laminated 750 and no problems holding a good sized beaver.
Here's a marginal hold...plus a stick caught in the trap. Slipping?...I don't think so...LOL.
Bad picture...but check out the catch circle on this beaver.No matter what MB 750 you choose...they'll do a great job for you. Hope I've convinced you laminated 750s hold just fine!