Beeman QB II 1085 Magazine Mod Question

I just bought a Beeman QB II 1085 CO2 .22 air rifle

I live in Canada and was told by Beeman that ordering spare magazines is difficult because of customs between the US and Canada. They told me about a quick fix where I could put a Marauder magazine instead by removing a small pin in the rifle breech. The pin, they explained, was for earlier versions of magazines and now serves no purpose. I was told that you pull it out with vice-grips.

My question is: has anybody done this and is there a video on how to do it.

Thank you in advance for any responses.

Paul in Canada