Yeah that Adam is a hoot.. real nice guy and quick responses too!
Basically it is as simple as taking the needle out, taking the head and nozzle off, unscrewing the innards out of the back and removing the trigger. Put back in reverse order, except for the needle is the last thing you will put back in. A drawing is good to have as a reference though. The only thing you will really need to clean with lacquer thinner or the sort is the nozzle and head though usually.