McShane has coached and played with the pair for the U23s.
He told the Manchester Evening News: "He's got some great attributes.
"He's a good lad, he's willing to learn, he's still very, very young. It's a matter of getting as many games from now until the end of the season because he didn't get as many games at Stockport as he'd have probably liked.
"That's just the career of a footballer. It's a very up and down journey and it's good he experienced that at such an early age and will hold him in good stead going on in the future. He's got a chance. He's just got to keep on improving and to have that attitude every single day."
Mengi, 19, excelled on loan at Derby last year and is playing regularly on loan for Birmingham. "He speaks - that's one thing I always try to say to the lads," McShane stresses. "As a defender you've got to be vocal, it makes everyone's job much easier. He's a great defender, he's got great natural ability defending, he's a great athlete, he wants to know, he wants to defend."
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