betseen the grass field and the oversized low bounce wheel, that will act as a spring in it's own. if you hit hard enough that you break the firewall off, a spring on your nosegear would do you no good as it would be bent completely back. on my trainer, i once hit the nose so hard that it bent back and but 13 dents on the motom of my fuse. the engine mount was fine, the firewall undamaged. i looked through it, no cracks. i just mixed some epoxy and thinned it out with rubbing alcohol enough that it soaked into the wood. no problems.