I removed the goofy 16" wheel from my E2 tandem and replaced it with a 20" suspension fork and tilting steering. Here is the result. Not suitable for shorter riders! I may try a 6" or 6.5" rear shock to replace the 5.5" Cane Creek.

If anyone is interested in the technical aspect to the conversion, let me know!

It appears going to the 20" front wheel allowed you to have positive trail and positive rake, instead of that insanely, unconscionably-unsafe reverse-rake fork and 90" steerer. I bet the handling is 10,000% better now. The suspension, although nice, pales next to the improvement in geometry. I also see you've routed the front brake cable on the starboard side so it doesn't rub the chain. Excellent job all around!