Adapter plate to remount a PCB on a different hole pattern
A thin intermediate plate that lets a circuit board with one set of mounting holes attach to an enclosure or chassis drilled for another. The plate is 3 mm thick with a footprint 10 mm larger than the board, four 2.5 mm tall standoffs with M2.5 holes matching the PCB, and four countersunk 3.5 mm holes matching the chassis. Cut-outs under tall components and a 5 mm cable slot keep it light, while 2 mm fillets on the corners avoid sharp edges in the case.
Both hole patterns are numbers you already have, and SpeakCAD places every standoff and screw hole where you say, checking they do not overlap. Preview free in the browser, then ask for taller standoffs, heat-set insert pockets or a second board position in the chat.
Design a PCB adapter plate 100x75x3 mm with 2 mm corner fillets. Four standoffs 2.5 mm tall, 5 mm diameter with 2.2 mm holes at 90x65 mm spacing for the board. Four 3.5 mm countersunk holes at 80x50 mm for the chassis. 5x20 mm cable slot on one edge.