No critism at all intended with my query. Numerous times I have read about building and maintaining homemade filters. Please help me better understand why building a filter unit is as good as or superior to a ready made filter unit? Cost, better performance? To my untrained way of looking at these devices seems like reinventing the mouse trip. Btw, I am all for DIY. Goodness, in my lifetime I've DIY'd many, many things. I also appauld those of you who teach others new skills.
Thanks in advance.
Thanks in advance.