Our metal core boards are v-score, I have never had mousebites suggested to me for metal core and I'm not sure how the nibbler would like it. regards, Graham Collins Senior Process Engineer Sunsel Systems (902) 444-7867 Note: new address! We have moved to 433 Cutler Avenue Dartmouth Nova Scotia B3B 0J5 On 2/24/2017 12:47 PM, Steve Gregory wrote: Good Morning all, We're about to build a MCPCB (Metal Core) and I'm having a little issue about panelizing it. It's a little teardrop shaped board about 1.5" wide by 3.5" long. So I did a panel drawing for the board shop to panelize this for me: http://stevezeva.homestead.com/Aluminum_Core_PCB.jpg I have one board shop telling me that the v-score is the best way to go as far as being able to depanelize it after building it, and I have another board shop telling me that a tab routed mousebite is the way to go because a v-score will make the panel too flimsy. So what is your take on it? The board has doubl sided SMT I've built metal core boards before at a past employer but they weren't panelized, so I'm not quite sure how stable it might be with a v-score, or how difficult it would be to singulate with a mousebite. Also we do almost all of our depaneling here manually, we don't have anything but a foot operated pneumatic tab nibbler. Any input is appreciated, Steve