My Blink never graduated past a mild reed valve engine / 5 x 3 combo that I can recall. So, it had a speed range of mild to zippy depending on how well the reedie was running.
With jittery park flyer equipment, a plane like a Slow Stick might just wiggle a wing, but with The Blink, it would roll inverted and then fly OK for a while until the next spastic radio disturbance. Eventually, I discovered a nearby indoor RC car operation that seemed to be the culprit. At first, I thought this plane had a design flaw or two, but the jittery radio gear must have been responsible for most of it.
At any rate, I want to revisit this design and do a better job of testing it and seeing what it can do with a healthy TD .049 / 4.2 x 4 prop combo.