OH, those are pretty cool. I'll have to look them up. maybe get a few and try them on our test layout. We know we will be doing our layout in SuperO. The connecting pins (outside rails) are straight flat copper pins, so these are kind of similar. The pwr buss connector is also copper but diff config. We may be able to apply your style connectors for gnd connectors on our outside rails (for same purpose - to reduce soldering). Ctr pwr connectors may require a diff solution.
Also, yes, wider radius curves do eat up the space don't they. For our layout, we've tried to design-in the largest curves wherever we can. So its a mix of 042's, 048, 054, 060, 072 - mostly in the 054 size. Wherever possible I did try to use easements coming into and out of a turn - but it wasn't always possible.
I like your spray paint too. we'll try that as well on the test layout too. Planning on using homosote as roadbed. Did back in the 90's. Liked it.
So many trains, so little time,