It isn't like this is the first one built and put to thread on RCU. Take a look at seamusGs build thread and see what he did. I think it was Jim that had the last good thread anyway?
Jim is a good builder and does a great thread and his planes always come out great looking and fly well. Worth looking at.A little weight is nothing new. Build a plane that the full scale had a rotary engine and then talk to us about adding weight!!Even by using big heavy engines doesn't cure the problem. Sometimes it's just the nature of the beast.