I'm glad that reason and sheer logic seem to prevail here! I hope paul will revert his drawing back to the original. As for the SPS-49, I believe yours (paul) is not yet quite up to the standard, but getting closer... - the one in current use is a fairly bland thingy. Since, evidently SB has gradually moved up-scale quality-wise, I see no reason why we should not reassess old versions and attempt to improve upon them! I don't think we anylonger can just settle for "good enough' when every serious artist in this community appears to be driven by an ambition to up the quality standards, even at times, to outdo one other in a noble competition!
Well, there are several relevant questions.
First, is the new drawing more accurate than the old one? I'm not convinced of this yet - SPS-49 is notoriously 'fluid' in size, shape etc even on professional line drawings.
Second, is the change in accuracy meaningful? If a single pixel must be moved to enhance accuracy, but 100 drawings must change, is this worthwhile? SPS-49 is used on many, many drawings.
Third, does a new and more technically accurate drawing accurately convey the nature of the entire system? Here, I will passionately argue, the new SPS-49 drawing fails. It looks very strongly like a solid-sheet reflector, when one of the defining (modern) characteristics of SPS-49 is the open mesh reflector. While an open reflector seen from the side looks very opaque in reality, it does not convey the nature of the real thing effectively.
We need to be mindful of all of these questions.