How do I Do SMB Turtle Shell Physics?

Hello all and thanks for looking. I'm creating a Mario Bros. parody and am having difficulty with the turtleshell physics - releasing a turtleshell sends it sliding across the floor.

I've attached a bullet behavior to it but the shell has the habit of bouncing into the air. How would I keep it sliding on the ground back and forth without it taking flight?

Thank you for your time.

I've tried everything I can think of with both the bullet and physics behaviors to no avail - the shell still wants to pop-up into the air and/or bounce all over the place. I think maybe the best thing to do is nix the behaviors all together and run the shell along a track and fake it. Any other ideas?

Thanks for looking.

Instead of bullet behavior, give it the platform behavior and set desceleration to 0 so it doesnt stop. The bouncing against solids should be prety easy to implement (i.e. Shell has wall to left >set vector x to 300. Shell has wall to right >set vector x to -300.)

Edit//

Here you have an example capx.

https://mega.co.nz/#!zFk1xJzK!SnAupG3uG ... CgcoV7eAD0