If this wasn't within the rules then it would be a minor thing they would simply remove the plane and tell you were you went wrong they do understand how some newer players may not intend to break rules so you basically get a slap on the wrist for most things at the moment

I'm sure it's a 3 strike system (that's 3 serious offences against the rules of the site all of which leads to a temporary ban except the third which is the permanent one

I think your revamp is just about ok it has better stoping speed the modderators will tell you overwise when they do the random checks I can't say for certain that it's is or isn't it's up to the mods but no need to worry over it they are usually kind about it if they find it as a copy and they have to remove it that will simply do so and tell you why and give you a link to the rules but don't think they are soft if someone posted a lot of copyed planes especially if they get round the successor system which is impossible to do by accident then they get a bit more strict and start giving temporary bans and in the worst cases I.e the person has copyed a planes been told multiple times and temporarily banned again and again then the mods give them a permanent ban