Thanks for the responses.
The potential of the Rock Pi with M.2 NVME storage is what's driving me.
I decided to compare:-
Raspberry Pi 4 with USB3 attached SSD storage, Cost less than £100 all in including case.
Rock Pi 4B with M.2. NVME storage cost around £130 all in.
(costs vary by country)
II have now given up on trying to use VNC over a WiFi connection to my Mac in the house as it is just so slow unless you are within a few feet of the internet router. Put a brick wall in the path and the speed just drops to unusable.
So I decided to fall back on ethernet with a Cat 5 cable to run the 40 Metres (131ft) from my warm study to the mount in the garden.
Transfer speeds for a 1GB test file between remote mount (40 Meters) and base iMac over ethernet
Raspberry Pi4 with very fast SD card .............. Forever! ( not worth doing)
Raspberry Pi4 with USB3 SSD........................... 6.9 MB/s. (Bytes not Bits)
Rock Pi4B with M.2 NVME storage.................... 11.1 MB/s
I was initially impressed with the Raspberry Pi results until I tried the Rock Pi with M.2 NVME.
Using VNC over an ethernet connection to the Rock Pi blows out my Windows laptop in performance!
BUT - there is an issue:-
My guide cam is a Toupcam and when I use Kstars/Ekos it works perfectly on my Raspberry Pi4 , as does everything else.
However, on the Rock Pi I have run in to what I think is a USB problem in that the Toupcam is not connecting under Indi although everything else works under KStars/Ekos. ZWO camera and EFW. Mount and Sesto Sense focusser.
I don't have the Linux skills to compile the Indi drivers (don't know how to get them) from source on my Rock Pi but was hoping for some guidance/ suggestions.
Edited by wornish, 14 July 2021 - 03:52 PM.