
Hi Doppler , any chance of a few photos of the whole scope , a look down the tube and a photo looking down the eyepiece tube without an eyepiece fitted .
These will help in negating a few basic problems like Dave say's , bad collimation and perhaps a spider vein in the light path ? .
I look forward to helping as it looks like your scope night have a built in barlow , but only going off the photos ( not to bad by the way

) as you have 'Double Coma'? ( yes I know its un-scientific , but ) and in my opinion only a lens will produce this , not the primary mirror but I have seen this once and it turned out to be the secondary , it was a bathroom mirror type , eg. second surface not first surface like as real secondary should be


.
Brian.