Thanks, I was very happy with how this turned out.
Bearing ware may be a valid concern. Between the D1-3 adapter and the heavy chuck, there is an extra 75 lbs above the stock setup. Hang that over the bed an additional 1.25" and it may cause extra ware. I've been running this chuck for years and I just took the spindle out to repack the bearings a month ago and things look good. So I don't know that it will be too much of an issue but I'll keep an eye on it.