I love VPA heads. Shot the 2 amd 3 blade heads with my compound. Both vented and non vented.
Penetrators sharpen up nicely on my kme broadhead jig. For in the field I used a cheap $15 Smiths multi tool deal from Scheels. Its yellow, has a flashlight, compass, carbide and ceramic sharpener, a fire starter, and possibly a screw driver?
Make sure to use the carbide sharpener as the ceramic has a different bevel.
Going to spring for a croc stick and leather strop just to see if I can get them even more sharp!
Both vented and non vented fly beautifully. Best broadhead on the market in my opinion.