Bar ends were a good idea, lizard skins ( i think ?) make some really nice ones that click into your ODI lock ons, proper neat idea!
As for 5000 miles on a chain.. Jesus christ. You checked that with a chain checker and that was a proper 5,000 miles? Like without going past its stretch point.. I'm lucky to see 1000 miles out of a road bike chain, or about 700 from the MTB chain.
Bearing in mind i change my chains early to avoid wear to the rings and cassette, rather then wear it all out and have to replace the lot.
Fair play though if it wasn't stetched out, thats probably a record.
Been convincing myself out of the powertap now though, kinda like when a workman blames his tools, if i've got all the right info there, then i can't have something to blame.. So yea, might just skip that

Been doing some heavy riding myself recently, taken the last 4 days off away from the bike, apart from the usual 40 mins everyday. Will get back on it hard next week though.