Modding a Eco Tad SX

Just picked up a new SunSeeker eco tad sx trike and down here in florida I seem to be running out of gears on the high end. While its a bit of an ego boost for someone who's not in the greatest of shape I could really use some advice. The bike comes with a single 38T crank up front and a 7 speed 13-32 cassette in the back. For the short term I've ordered a replacement crankset from a local shop to move to a 44T up front but what are my other options long term for better range. I do quickly drop down into the granny gears on even the smallest inclines but want to take advantage of the flat and downhill slopes. I considered a 3 ring up front but there doesn't appear to be a place to attach a derailleur without modifying or replacing the boom. I considered putting in an internal 3 speed hub to extend the range but that seems to be asking for a lot of trouble with a wheel rebuild and more complexity.

Any ideas? Also any other mods for this trike that you would recommend? On my list is to move to 20 x 2.0 tires and tubes at some point. I also wouldn't mind moving from a grip twist to a trigger shift.

 

A Patterson Metropolis crankset/Bottom Bracket might be a cost effective way to get a double chainring.

 

How would you mount the derailleur for that?

 

Oh nevermind. I see. It’s kind of like an internal gearing system for the crank side instead of the wheel side of the drivetrain.