My latest changes to the Trek 7.2 FX: I upgraded the crankset from stock to an Origin8 Trekking, with the same 48/38/28 rings, but longer 175mm arms, and it's
a lot lighter and better looking than the Shimano M171. This required a shorter bottom bracket spindle than the stock 121.5mm. I went with a Shimano UN-55 110mm to keep the correct chainline.
I wrapped my trekking bars with regular synthetic cork bar tape, on top of 400mm long foam grips.