Thread: Diy gong info wtd

Hi guys, at work i have a bunch of steel plate 20mm thick a mag drill and a welder eho will work for beers I want to have a go at long range gonging on a mates farm.
Anyone had a go at making them themselves and what sizes would you recommend? I'm thinking 300x300 two holes at the top small length of chain from holes to hanger. Any info would be helpful cheers