You dont have to remove the old condenser, just snip the blue-black wire going to the points and make sure the snipped wire does not foul in anything.
While the magneto is open, set the points at 0,4mm gap at index. Adjust the timing so the points just open at 1,5mm BTDC.
You will need a cam/clutch puller to adjust the timing... but it is a handy tool to have so might as well get one.