Really does make a difference. Recent purchase of my 07 Norge - while I love it and it reminds me of riding in the 1970's bike it felt kinda raw and powerfully tractor-ish going down the road.
Finally got around to having decent 40ish degree F sunny weather to get into the garage to do my first CARC Throttle body balance and TPS reset using new tools on Hi Ho Silver w/48,000 previousy miles. With my new Carbtune in hand and (thank you Beetle) NEW Guzzidiag directions now software & Mac connected I got'er done. S M O O T H... even as it was not that far out of compliance and pretty easy to do, now in the rear view mirror. Would have been very challenging to accomplish it without A LOT of reading, some new tools and guiding insight from some very helpful individuals who write directions quite well. Something very difficult to do. Thank you Pete Roper and Beetle.