Gentry said he would do a bi metal shutter only if he needs the added performance. He did think about using bi metals in competition which is how the polished wa rim was created
Edit: well the new worlds edition wide angle has an extra almost 2 grams on the rim, pretty nuts
I still prefer the heavier OG Shutter over both the lighter Shutter rn and the WA. I need to grab the WA World Champion edition and see if the little bit of added weight make me like that throw more.