1187 loading port mods

Guys,
Loading port mods - Any gurus out there who've done this ?
Have already had a limited go at it to bevel/polish the entrance to the mag tube
Also have replaced shite factory follower, polished tube internally and shortened the spring - made a big difference when loading, But still not that slick
Have seen pics where blokes have taken/dremeled the whole area away until a good portion of last 12ga shell in the mag tube is poking out.
Can it i do this to an 1187, or will it stuff it ?