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Alex,
From my limited experience I only have one piece of advice , keep it simple
My 10” f5 Klaus Helmerich Carbon Fibre Newt ( 1280mm fl ) is a real winner
Easy to collimate , plenty of reach and a real light bucket (I built it for under $2000 ) Bought the KH CF tube ( designed for GSO gear ) from Sidereal and GSO parts from Andrews ) It reached focused with my 2600 using the EAF with 15mm spare travel and collimated beautifully first time !!
Same can be said for my older metal tube tubes , the 8”f5 and 6” f6 although there not in the same league.
You’ve seen my images over the past few years in both crappy Sydney light pollution and pristine skies down south from my Dome
Best always
Martin
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