I had to reinvent the way I shot my 10-pins at Moonah because of the wider ball returns.
I used to be fine with the old Sure Pik's, but when they all got replaced I found I used to miss heaps of them on the right-lane because the returns used to get in the way, used to get my foot caught in the bar at the bottom now and then.
7-pins only ever posed a problem when the backends were wetter than the heads, give it any room - seeya later, get cute with it - you'd pull it into the moat.
It's taken me a while to figure out sparing consistantly on synthetics, I was a much better spare shooter on the wood, but I'm getting back to where I was.
A lot of trial and error and frustration though.