There was no other cut of ESB shown in any cinemas in 1980. Very minor differences between the 70mm and 35mm but the only different scenes were the ones shot after the 70mm was completed and shipped to the duplicating house, of the rebel fleet at the end.

This is just his memory mixing stuff up. It's the same as people swearing they saw Luke miss the first time with the grappling hook, seeing the Luke/Biggs scenes in the film etc

Going through what he claimed to have seen

RED BACTA TANK - He's remembering the Ralph McQuarrie concept painting. When it came to filming they lit the Bacta Tank with a red light from underneath. But, the added illumination from above bleached out the red under lighting. There was no red liquid clearing up at all.

Dead Tauntauns. Nope, a brief glimpse exists in the released film. A picture of 2-1B examining the Tauntaun was seen in publicity pictures and the sticker book. A few more lines were added into the marvel adaptation.

WAMPA ATTACK - Definitely NOT in any cut. It didn't work early on and the sequence was scrapped during filming. It was never finished.

WAMPA TRAP - again it was not included

BACTA MASK - A photo of 2-1B taking off the mask existed back in 79-80. the scene was also included in the Marvel comic adaptation.

GENERAL VEERS DEATH - This was in the novel but was cut out early in the editing stages, before any effects shots were complete. It was included in the black and white workprint. When the scene was cut the effects shots that were already completed were used for when Luke destroys the AT-AT.

LEIA & HAN ON CLOUD CITY CONVERSING AND KISSING - Again in the marvel adaptation and the novel

HAN SOLO TORTURE - He is describing exactly what happens in the movie