Just bought a beautiful RTF Extra 300 from another flier at my field. Flew it first 2 flights today. The wheel pants are held on by a "wheel collar" type fitting with 2 screws through the wheel pants on one side and the pants are already cracking and not on firm or tight.

What are the best products, gadgets and techniques to secure the pants well so they don't move, crack, or fall off?

I had previously taken off all the wheel pants on my other planes since our field is grass but this Extra is big enough that the wheels should clear the grass without much trouble but a rough landing might do a job on them the way they are secured now.

Thanks!