Just wanted to give a shout out to Minden Outers Club!! I really wanted to make curling stones for my boyfriend's 30th Birthday (he's a huge curling fan) and I was at a bit of a loss until I came across your website!!
We too used stainless steel mixing bowls. We screwed 2 bowls together and cut out the bottom of the bowl placed on top so we could pour the concrete in. Luckily my Dad is an electrician and was about to bend conduit to use as the handle. I used a regular garden hose, sliced down the middle, as the bumper and taped them on with electrical tape!
My Dad flooded the ice for us and they worked like a dream! It was a GREAT weekend!
Here's a video and a few pictures!
Thanks for the help! :)