One thing I would certainly check if you're using the stock setup is the condition of those dowel based pushrods. That's how I lost my first one - the elevator pushrod busted in the down line of a loop.

What does the manual say for the CG?

Moving the CG back will make it more receptive to control inputs - i.e. touchier but you can dial that out by using less throw and exponetial rates in your radio if it has those. Lower high and low rates however should be enough to control the touchiness while still getting the minimal elevator input during inverted flight.

I went through this with my second one as it was my first pattern "trainer."