This is a nice orange/yellow rod that works great in Midway's Sea Raider. All you have to do it cut to size, then put some sighting marks on it starting from the bottom spaced 0.5 inch; apart seems normal. These were originally small bevels cut into the plastic - the triangle edge of a file would likely do it.
The second photo shows a damaged and repaired rod installed for perspective. I hope to find a better photo from a collector soon!