RB5 Vega Drive shaft issue

[jackeltrader]

Hi Guys,
I'm just putting the finishing touches to my vega conversion, however I have noticed the drive shafts are pretty much sitting at the very edge of the outdrives. I presume I need longer shafts or dog bones but cannot work out which I require. I have used an RB5 SP to do the conversion but not sure which shaft set I currently have or which I need to allow full droop without the drive shafts falling out?!?
Be grateful for any ideas or if you have encountered the same issue.
Thanks,
Craig