After installing the 10 watt 25K resistor (up from a 10 watt 20K) I measured 352.2 V DC. Up from 338 V DC I measured with the old resistor. Nice...
One of the thinks I like about this hobby is the willingness of hams to share knowledge, parts, and past experiences. If you can help someone out please do. I have in the past and will continue to do so like countless others in this great hobby.
Thanks again James!