I used this same method of making my own terminal unijoiners with one small modification. I had a spool of old telephone wire (22 awg) . I took a unijoiner and cut a small notch in each end of it for the wire to be recessed into the joiner so it would let the track snap tightly together. I found that if I didn't cut the notch , it would create a small gap on each end of the joiner where it meets the rail and leave a gap. I use these on every piece of track connected to a 14 awg buss wire and have unnoticeable voltage drop. Bulletproof. Don't waste your money on those Kato terminal unijoiners, make your own.