Oh what I seen that vccomm and I'm shocked. I did have two of these,but with the big move I had to part with them. So yes I do know a little about them. One of the biggest problems with them is getting the heat away from everything. In fact I have even seen one melt the alloy cover over the engine. The dress cowl was in no way repairable. It does sound like your was run hot as well. It does come down to house keeping,and the more grass and dirt around that alloy cover the harder it is to get the heat away. Does sound like you have some fixing to do. Good luck with that you cheeky bugger.