Thanks for the comments / suggestions / photo! I don't have a 2x Barlow I can use (for that setup only a 5x) and I did spend half a night experimenting with different iso / sub lengths. Unfortunately for whatever reason I had trail on all the shots (even at lesser exp times) which was no doubt due to the dob mount being a little hit and miss for deep sky photography. Looking through the subs i think I will get the core but lose out on the 'rings' to do more I think I would need an equatorial, feel a little defeated but I might put an order in for a 2.5x telemate after I complete my next expenditure (mod DSLR). And try that out later ... Or put an order in on an eq6 hmmm
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