I like that system a lot but realised when I got it last week that my 29er doesn't fit too well and I have the 3 seat bench.
I am considering swapping it out for the 2 + 1 so that I can remove the single to fit it in and then maybe install something like this.
Slightly more faff, but have you considered either removing just the back wheel and putting the bike in the other way, or removing both wheels? Might save you swapping the seats, floor and mounts.