I remember that well as I could not get all out the door either..I had to take the wood panel off the mechanism by unscrewing the wood panel itself off...then get track to work and seat track, then rescrew on the wood panel...Cumbersome yes, impossible no.
Stuart and Stella Denning
2016 Entegra Aspire 42RBQ
The 3 Bulldogs (Daisy, Sylvie and Stashie)
2018 Equinox Diesel (TOAD)