Hi Programmer.
My view is that the Telrad is the best accessory ever invented for visual observing. I used a Telrad and a widefield eyepiece to star-hop to hundreds of deep sky objects. There is a view among some old hands that a Telrad complements rather than replaces a finder-scope but I used one without a finder for years.
The drawback is dew that forms on the glass, but since the screen is not a precision optical surface you can wipe it with any old cloth. Better is to get someone electrically inclined to fix an array of resisters attached to a battery to act as a dew-zapper.
But Telrads are great
.
Cheers
Drew