I have a question regarding mounting THT power transistors (TO220, TO247...). I am building a output full bridge for a welder and I thought about not using PCB at all for the power terminals (D,S). It's pretty normal to use the tab of a transistor as a contact that is clamped to the heatsink whick function as a "high current" conductor. The tab is usually the drain..but what about the source? I am thinking about clamping the mosfet legs between a busbar and a clamping "washer".
I don't see any problem with that but I haven't seen it done anywhere so I thought about asking what you think.