So now in 2021, is the consensus pro-bullet or anti-bullet for the common connection between the ESC and battery? So, let's say, if the hard LiPo pack has bullet tubes, then should the in/out normal connections--like if you were changing batteries, charging, etc--be the bullet/tubes over and over again, or should they be kind of a one-time-thing and put an upstream Deans or XT60 connector instead to handle the heavy swapping? Based on pictures, it seems that bullets-only is the "pro choice(?)," but I've also seen chassis pictures of pros' vehicles with Deans as well. So it's really a mixed bag. Basically, I am only set up to do bullets, but looking for longevity improvements; I don't want to wear down the battery tubes and end up with a loose connection that cannot be fixed. But maybe what Alexv2024 said in Post #15 is a good way of looking at it: by the time the tubes are worn out, the batteries are worn out as well and should be replaced.

As for bullets to use, I have recently bought some high-profile/tall 4mm bullets by ProTek. They seem to be the ONLY ones that have the taller design with the solder cup. To me, these provided a taller, "more-grippable" design, especially if they're tight in the tubes--which they are indeed--AND they provide a clean and easy method of soldering. They also are VERY tight, which kind of worries, me actually. There's tight and snug...and then there's too tight!

The Trinity/Revtechs posted above look to be a good design, but I needed 4mm, not 5mm, and at $7.50 for a pair, that's a bit steep, IMO. The design is probably the best I've seen, however, as long as 12AWG wire can be inserted cleanly into the window for soldering in the cup.