Garry.....the Intruder does not have anywhere near enough rudder to do a stall turn unless the c/g is as I described. I think I had a small amount of stick on lead under the stab....but I had the heavy APC 14x8 also.
Even then you have to fly it just right and sometimes add some throttle gently to get it over the top. It lands and flies very nicely at the rearward c/g.
If any airplane is nose heavy it becomes more difficult to do a stall turn because there is less of the nose fwd of the c/g so it takes still more rudder power to get the now longer tail behind the c/g to go over.
If you feel it takes more down elevator to fly inverted that is comfortable....reduce down elevator expo...or depending which radio you have...add opposite expo to make the elevator more sensitive in the DOWN DIRECTION ONLY.
By the way....My Intruder's factory installed pushrods were binding so badly I had to cut into the bottom of the fuse at the rear former to remove all that junk.
I installed Sullivan pushrods that were very free and had no trouble. A local friend had terrible control problems until he fixed it.
His servo arm was flexing so much that it was sure to break off if he had flown it much more.