So I just finished upgrading my PM8 thanks to a ridiculously good deal at my local paintball store ($60 Canadian, $43 US) I picked up an ultralight on/off and Billy Wing bolt to upgrade my PM8 this Fall.
Just got around to installing the upgrades last night and I gotta say the PM8 and PM7 w/ UL (moreso) are still fantastic deals in paintball. With a little investment my marker has all the niceties of a 2013 Dye Matrix, shoots as good as about any tourney marker, and had a starting price of $200 2 years ago.
Will take some pictures and do some videos soon. For anyone considering one of these markers, they're still a great choice. Just buy a couple of eye pipes if you get a PM8