99% of the time there are no "dumb questions". If you had asked if it would be a good idea to arm your trainer with napalm and drop it on small animals and children then that would be a dumb question. However on this same subject... pusher setups. When the airflow is not bing run over the engine are there any cooling concerns with pusher setups; ie. use a higher oil content/ dont allow to idle for extended periods? I am thinking about getting one of those pusher planes too.