Alright, thanks to Guspaz and Ricer, I re-built Tomato up to latest (1.27-mp3alpha7) and includes IPv6 functionality.
Hopefully they won't mind that I'm posting this now.
1.27 merged in
Missing spinner image fixed
Packet reassembly fixed
I also updated Busybox from 1.14 to 1.16, which includes a few very needed fixes to ping6 and traceroute6--
TSI Gabe - TekSavvy Solutions Inc.
Authorized TSI employee ( »TekSavvy FAQ »Official support in the forum )