With 8 modules so far I've only used two Kato switches, and that was because they were on doubles, so close to the edge that the only way to connect was to use them. Both 4's and the yellow line goes through the diverging route at shows. So they HAD to be modified and tested and checked, and they have been proven under fire. They can work, but you've got to fix those darn points. Watching one of Mike K's Japanese bullet trains at Altoona flying through my 4's at about 120 mph on the diverging side has made me pucker, but I didn't have to fix or rerail anything either.
Other than that, It's been Peco all the way inside the modules. And I've got one renegade Rokuhan Z that I dual gauged, but that's off the yellow line and not in traffic.
I'm just not a big fan of Kato track, other than the required end connectors. And what I do have is painted and ballasted. I really don't trust all those internal contacts. I've always hotwired the points to the stock rails with tiny chunks of flex wire (decoder wire works great) as part of bulletproofing of all my turnouts.
By strict Ttrak rules, I've been told I'm illegal as anything, but I'll put my trackwork up against anyone for reliability at a show. The real bugaboo on Ttrak is being downright anal about module-to-module alignment at the joints, particularly coming on and off curved units.
