Ed, I think we're forgiven as long as we don't hang a sissy-bar off the bac, horns to the forks, and glue fur to the tank - may that cretin rot in motorcycle hell!!!
I have seen several folks post that their Windjammer used a standard sealed beam headlight. I'm about 99.99% sure that the Windjammer SS that came dealer installed on the 1978 R100/7 I bought new had the stock headlight installed into the fairing. Maybe some dealers put in the cheap bulb, kept, and then re-sold the original BMW light to further "enhance" their profit margin?
I am on the verge of ordering one of the HID conversion kits but after doing much research and reading there is one camp that strongly argues that the light output from an unmodified reflector system is crap, glares like hell, and is actually worse than an H4. The other camp says that is correct unless you shim/space the HID bulb to the "sweet-spot". This makes a lot of sense to me as I remember buying a replacement Mag Light Krypton bulb for my 4-cell Mag Light years ago and it came with a pack of "shims" so the bulb position could be "tweaked".