Sorry, my first idea didn’t go how I hoped it would. I have a second version of the new roller assembly printing now and I can try it out in the morning. I have a set of 25.4mm stainless to give it a try myself as well.
If you want to get started here are the corner files, https://www.dropbox.com/s/3shua2mftqqtexu/CornerJ.zip?dl=0, I can zip up the middle in the morning and if the roller comes out okay I can release the full beta. I’ll update the foot dimensions to fit but no revised foot version yet.