I realize this may be a dumb question, but I've never seen it discussed. Was just researching the GP Venus (although there are plenty of similar planes in this configuration). I'm used to the typical trainer setup where the engine is upright, the glow plug is easy to access, and there's no cowl in the way to hinder needle adjustments. Can someone please explain how the engine is started when it's inverted, and how do you adjust the idle once you have it running?

Thanks!