I used a angle finder and a China (grease) pencil in red to mark the line, figuring maybe I'd get used to the position and remove it later. It's fairly faint yet easy enough for me to see from the cockpit, Has helped me a lot since I'm pretty low time in the six.
Proud owner of 925RV
Special Thanks to Fred Stucklen
While I'm not a builder if I happen to give advice , I will not be responsible for damage to equipment, your ego, parts, world wide power outages, spontaneously generated black holes, planetary disruptions, or personal injury that may result from the use of this advice.