Joop de Korte's percussion wasn't audible in telegraph road's original mix in 83, but in the 88 MFN comp version, you can clearly hear it....
No. Joop didn't have bongos. That percussion was added in 1988. And it's horrible.
In Twisting by the pool (from MFN compilation) they added and removed some data too.
I don't find it "horrible", I guess it was to match the studio version, which has this percussion lick at the start.
the other difference is that hal's guitar is muted during the slow middle solo. On Alchemy, it sounds a little bit detuned, so it's maybe the reason why mark decided to "remove" it
as for twisting by the pool, I hear a different mix (e.g. Mark's voice is less audible just before the solo starts), but I'm not sure if there really are "some added and removed data".
to me, the MFN versions were "only" remixes from original multitrack recording. it means you can hear tracks that were barely audible in original versions, or on the contrary don't hear other tracks anymore, but it doesn't mean that parts have been "added" in 1988.
how are you sure bout your info ? do you have more precisions about Joop's gear ?