Thanks Houghy, Lester, Jeff, Scott, Clive, Antu, Dave, Dietz and Mike, thanks for the kind comments..
Scott, I use the baader MPCC but I still manage to get coma in the corners. I think I need to realign the secondary again after modifying the spider.
Mike, the posted image would be around 50% crop from the original frame. Mainly just for a nice composition...
cheers and CS
Gary