Putting OMV hammers in NMV

[Bitter Creek Jack]

I managed to get an old OMV hammer to try out in my new models, and ran into a small problem.  I have mine set up to free spin.  Once I got the hammer in it seems to work fine, but the free spin doesn't work anymore.  I pulled it back out, and I guess I will have to just wait for Blackhawk hammers.