Looks like that is removable OIF. Could potentially be replaced with a wider funnel. Do I see a new 1-off lost foam casting in the making?....or you could wimp out and just a make a sheet metal version... Best, Kelly
The cast funnel on mine is riveted into place. Obviously removable, however the easiest way to make it larger is indeed a lost foam drop in chute. Quicker than sheet metal with mass to stay put with no fasteners. But it must be easily removable because it's a stretch as it is to get my hand inside to grab a sample to test for moisture.
