I have had the pleasure of observing with Dave and Julian on a few occasions and yes the 18 incher is certainly an impressive scope giving some

-ing views
A few that stand out in memory are m42 with amazing detail, the trapezium with the E and F stars showing as mdium bright and standing out like the proverbial, instead of quite faint stars as seen in my 10 incher.
What this scope excels in is viewing planetary nebulae. In my 10 incher, I mostly see a blueish disk and if Im lucky see some rudimentary structure. In the 18 , the structure and detail jumps out at ya ! Truley amazing views
Oh and incidently, its also a lovely looking scope

I would love sometime to own its baby brother, the 15 incher, thats my dream scope