Oh, damn, I just realized I don’t have chapter files for ROTJ - could someone please provide chapter stops in formats that could be easily implemented in MKV Merge and TS Muxer?
This site has the GOUT chapter stops, and since your release is GOUT synced I assume it will work:
http://www.chapterdb.org/browse/30159
I muxed it into my copy of ROTJ Despecialized with no problems.