Too noisy. Duh!! Do cops/neighbors prefer straight pipes or mufflers? I wouldn't use the Webra on a trainer. Be a shame to damage it on a trainer crash. The 40 Alpha is cheaper to run. The 60 is a bit more stable, more expensive and easier to see. Either is fine.

Save the engine starting for when you get to the flying field. If your truck is nitro take all of the stuff you use for it to the field and some 10% or 15% nitro fuel. The Alpha will like that blend too. The guys at the field will be happy to help you start it up. Half of them will try to buy it from you, especially the engine. Try to rig a way to control the engine throttle before you get there to make it easy.

The battery attached to the glow plug was one way they used to keep the plug hot and avoid flameouts at lower power settings. Go ahead and remove that.