Okay. Hear me out:
You will ONLY be in the easy-pedal-gear when you are actually climbing UP hills. The rest of the time you will be I the "standard gear".
Why not just FLIP the HUB and have one small sprocket on one side of the hub (standard gear) and one larger sprocket on the other side of the hub (easy-pedal-gear).
Yes it will take a minute to dismount and quick release hub your rea tire and flip it but why not do this?
I did it and it works great. And I have enough length in my rear wheel drops outs and they are HORIZONTAL so I do not even need a chain tensioner or 2 different chains. One chain works for BOTH sizes of rear sprockets just fine!