This brings me to the thread about replicating the 3D buttons for the EX800.
Funny thing is that I was searching for an affordable EX for a while to do some measuring but yesterday I was working on the RX5 retrokits and a post from an old colleague of mine popped up (haven't seen him in about 15yrs). Seems he made a track with RX5 and... an EX800!
I contacted him and will meet up with him soon, so the 3D replication is a step closer now.