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Hi Mark. that's a pretty good first light - looking promising.
At f4, the collimation needs to be spot on and this doesn't look like it is. Assuming the scope has a coma corrector, star elongation like that can be due to the scope optics being aligned on a different axis to the coma corrector. Suggest a laser collimator (which will also need to be aligned unless it it a top line one) and align the scope collimation through the coma corrector.
The outfit is right at the top of the HEQ5 comfort zone re weight, but it will do the job OK if there is no wind and it is properly balanced (and if you tie down the cable on the guide camera).
Edit: agree with David re lighter guide scope - I use a modified finderscope on my f4 system and it works well.
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