Two years into recreational marijuana legalization, Colorado is taking a second look at its rules for medical marijuana. A panel of state senators is indicating the process could get messy. They voted yesterday to scrap most of the administration’s suggestions on updating the state’s regulations governing medical pot production and sales. Instead, lawmakers will start from scratch. The procedural move indicates that lawmakers want to take a closer look at things like rules for caregivers, the people authorized to grow pot on behalf of people on the medical marijuana registry. There will also likely be discussion on expanding medical marijuana product testing. Currently only commercial retailers can use labs designated to test commercial pot, and lawmakers want to see those labs able to accept and test home-grown weed.