Correct. I would remind everyone that the 30 min post flight and nine hour free of duty are all part of the "template" of the original trip. If ANY part of that template touches another calendar day, that's a whole extra 24 hours free of duty!

Assuming you haven't flown a reserve GS yet and have no PR days on your schedule (which makes the math a bit trickier), that's why a trip that blocks in after 1430 is such a good deal. Let's say you fly a one day reserve GS that blocks in at 1445. Add the 30 minutes plus nine hours and that takes the template of the trip to 0015 the next day. You have now violated two off days and thus get 48 hours free. Had your trip blocked in 30 minutes earlier you would have only gotten 24 hours off.