I was going through my Hooded Cobra Commanders and I noticed something about the hoods of the heads that may consider a different mold or just might be to something to small of a difference to be considered a new mold. I have all versions of the (v25 2007)hood molds except for (v29 2008) and (v55 2017) so I can only compare (v25) to (v, 34,40,50,52). What I noticed is that (v25) is a slightly bigger hood/head and the underneath has a deeper ball slot than the other versions list above. This may not be enough differences to list on the site but its always fun finding variants for the site.