I am mounting this engine in a H9 Cap 232g and am trying to decide between the H9 aluminum mount that has the rails grooved so that the engine can be slid for and aft on the rails, then bolted down. Or, am considering a Dubro soft mount. This is my first big scale engine, so I was thinking there may be a lot of potential vibration from the H9 mount directly bolted to the firewall, but have read lots of guys use them for other engines. Then I have read the dubro mounts are good, but there is some slight wiggle in the engine, due to the rubber stoppers. Some have failed. I guess the rubber stopper have to be peridocally replaced too. I can't decide and would like to mount the engine soon, so any help would be appreciated. thanks.