I am unsure if this is the best place for it, but this seems to be the most recent S3&K thread in the forum; hence I am taking the risk.
I have begun working on a Sonic + Tails all emerald run. So far, it has been mostly a cut & paste exercise; using the latest Sonic + Tails run and copying the special stages from he Knuckles run, with some input to merge the two. Needless to say, Upthorn and Nitsuja are to receive due credit (and I want to take the opportunity to ask for the required permissions to use their input).
The WIP (which includes all of Angel Island) is
here; I am expecting some merciless but much needed comment by the experts :-).
As can be seen, I encounter a few issues. For example, I can't pick up the lightning shield at the end of AI1 as the moving platform is in an inconvenient position (due to the extra time needed to enter the special stages). Also, after the first special stage in AI2, I cannot figure out how to go through the floor except after it has finished falling; I would appreciate any pointers.