I made one of the brass landing feet parts for the studio scale 44" Eagle transporter.
Very challenging! I made it from sheet since the channel is no longer available at the correct sizing.
With advise from other that have made these in the past; the channel is best produced from solid bar stock and machined to size.
Doing so; by machining from solid, should result in the metal work being easier to produce and solder. It should be stronger in the long run as well.
This is what I will do.