I've seen even charter captains use that method on their roller rods. I think more common is a loop to loop connection between fluoro topshot and braid mainline. I'm still using what I learned first, a bimini and an Albright. Then again, I don't chunk near as much as I used to.
I buy 75ft topshops from Basil at BHP Tackle and connect via loop to loop.
I agree, for chunking with Conventional reels, the BHP tackle topshots are the way to go. Topshots (windons with a lot of leader) make a 100% connection, they are easily retrieved onto the spool, and there is no chance of damaging your guides.
Swivels between mainline and leader, even the little ones: require two knots, each of which weakens the line, create two places to make mistakes, and can quickly damage guides. Every time I've put a swivel on the mainline and attach a short piece of leader, vowing I would not reel it into the guides ... Other than that, they're great.
For chunking reel capacity is most likely not a problem. Braid or mono.
If braid connect 50 to 100 yd mono top shot, Bimini & cats paw or Page Ranking. Then spro power wind-on 150-250 lb swivel 7 ft floro leader.
More knots yes but easier to change leader once worn by fish teeth.
I fish during the day so I don't want a swivel anywhere in the picture which is why I like to start out with 75ft and cut back as required. Line twist is usually not a problem as often the fish are right at the boat often in sight. I cut a slit in the chunk and slide a small circle in there so it's hidden and pulls out if you have to reel it in after a drift. I'm always pulling line off the rod so the chunk is never spinning in the current. There is nothing like 3 or 4 big yellows swimming around 10 feet of the transom to get your heart pumping.
I assumed you were talking braid to flouro, and you know what they say asumming! anyway, years ago Peace Marvel and his crew used to join thier mono and flouro with a small swivel before they found better ways. they used bigfoot windon guides and I guess it worked out ok. if you're fishing at night a swivel and short leader should work fine. where are you fishing by the way?