Here is my only Neptune - it was taken to fill out my solar system project - last 'dot'.
I must say the colours of Uranus (he he) and Neptune were easily visible through my 8" and the LPI picked them up well.
No Mercury - I will add it when Mercury is around when I am setting up for other targets - it will be very small through my set up. I will add Pluto too - this will be a dot - but eventually I will get them all.