can i use these to adapt an ics board to...
can i use these to adapt an ics board to 4x4 bolt-pattern bindings if i don't like the groove-mount bindings on the market?
Nope. Sorry but this plate will not provide that option for you.
No, you cannot... The current risers do not currently work in association with the channel.
However, you can use ANY Burton, or recent Forum, bindings as long as you have the retro compatible disks that shipped with your stick.
In my personal opinion, you should drop some EST bindings on your channel board for unprecedented board flex and feel!