Rebuilding McClure Air Rifle Pellet Trap?

[Gwhite]

I'm using it for air pistol these days, so I posted my query over in that forum. It occurred to me that this trap was originally primarily designed for air rifle. Rather than have two duplicate threads going, here's a link to my post on the pistol forum:

http://www.targettalk.org/viewtopic.php?p=143333#143333

Thanks!