After a ride or two I decided bigger wheels were in order. Got three 26" rims, new spokes and tires. I stripped the 20" wheels and re-laced them. The trike is a tandem and my wife and I have different cadences we like so I put a 34 tooth ring up front going back to a 36 which gives me a slightly faster cadence. It might not seem like much but it makes it so I can feel my wife peddling. I also had to change the sprocket going back to the rear hub to a 24 tooth to keep the gearing correct. A couple inexpensive banjo chain tensiones to keep the wheel from sliding forward and into the frame and the ride is 3" taller with noticeably less rolling resistance.
Total cost was about $250 I saved $50 each wheel re-lacing them myself.
Next thing will need to be a Nuvinci hub so I can shift on the fly, I have to tell my wife to stop peddling so I can shift with the Sturmey Archer i8 hub and when going up an incline stopping peddling to shift loses too much inertia.
Handlebar bags go on the backs of the seats quite well too.