Welcome to the forum. The stock boards can handle 16 V. If you ever want to upgrade to a Sergey's Board he, or I can help you out. Just send me a PM, and I will explain the different services we offer. Hopefully we will be seeing some new smooth bore barrels very soon so stay tuned for that. I've never done the Crossman mod, but there is probably someone here who has. Both forums have really helped me a ton with my mods. There are some very knowledgeable, helpful, and not to mention nice folks here.