Possible Clues:

• Trying to prevent train sets being laid out wrongly
• Proof of wanton tartiness
• Rave around sites for development is unaffected
• Proof of tests Iran carried out
• Able to withstand adverse conditions
• Proof of saint's transfiguration in balance
• Able to withstand rains? Test must be organised
• Defiant as train set's broken
• Model train sets unlikely to be damaged?
• Unyielding — proof