trevHCS:
Personally I found sticking with one technique worked best otherwise it totally confused my brain trying to switch. Did attempt to swap from using the back to the front of the trailer on one practice shot and got it spectacularly wrong. Everyone finds their own niche of course and you might have more mental processing capacity than me…age is not helping.
Haha, I know what you mean there!
I had to walk out of earshot whenever our trainer was coaching the other guy, as I knew I’d get confused if I listened.
(I did let him know I wasn’t being purposefully rude - I was just minding my poor brain!) 
For me, I knew I would only get through it if I dismissed any tips and tricks and just worked on the picture in the mirrors. Just like my clutch control problem I mentioned in another post, I’m up ■■■■ creek as soon as I stop thinking and start overthinking.