Work of art right there. Love the look of that T1. I am looking for one that has pins you can set into a PC board instead of wires. Is it only the core type that matters?
not sure what are you talking about? T1 ? it's original bobbin (which you can order from EPCOS) comes with pins for PCB. you can use it, but it has no sections - you'll be limited with layer-by-layer winding method, with insulation tape after each layer, which significantly limits possible number of turns. that is not good for push-pull (2 mosfets) circuit type.