Hi,
Yeah I used to find this stopper a bit of a hassle on my four line set-up (with a SS stopper ball). Mainly a hassle on dropping the kite/BnLines.
I'd say (from over here in left field) that you should look at the option of converting your kite/BnLines to 5th line.
It's not as exxy as you'd think (should be less than $100 all up for a new 5th line and your kite resewn).
The bonus is a safer ride, better relaunch and far, far less tangles (in my exp) when dumping the bar n lines as there is usually no 'death spiral' as the kite comes down.
BTW I still use the stopper ball on my 5th line but I've never had it get in the way when self launching. It did pick up about 5-10kgs of weed in 27+kts at Pinnaroo recently... but that is another long story lacking any glamour...

Avagoodun.