Bike Forums - Hello from Ontario

Greetings, All
I am new here, but have found the site helpful already. I rode quite a bit in my youth, but only sporadically afterward, until the early 90's, when I purchased a Norco Bush Pilot, with the intent to get into better physical shape. It helped, but I found it difficult to dedicate enough time to it. In 2006, I acquired a Specialized Sirrus Elite, with the same goal, on which I tried to routinely cycle to work (18k one way). I recently retired and have congratulated myself by purchasing a 3rd bike, a Norco VFR2, which I use to bomb around town. Since I now have the time, I have taken it upon myself to perform more technical repairs and upgrades to my bikes. That was the main intent of joining this forum; I have some questions I will post, firstly concerning freehub upgrade/replacement. Thx.