Carb issue?

Nah, replacing throttle blades is just nuts and bolts, like everything else. And epoxy done right does not fall out.

For some one who does it for a living I'd agree. For some with limited understanding about carbs and tuning its easier to use different pcv's. I know I'd rather change pcv's or orifice bleed sizes than change throttle blades. It doesn't require pulling the carb off to start and can be done numerous times in a few minutes.