i left my camera at work
it's a very subtle change that i think should greatly smooth out the flow, especially coming down the back straight. that is where my kids caught the corner most of the time.
do you have rail liners for the mini-96? i think these would keep them moving forward vs. t-boning the rails.
the 1st mini-96 (which my cousin still has) had the low rails. we all commented on how mini-z's were able to run over them however i think they would be perfect for the dnano.