Ok so after some emailing back and forth and some mod searching on the Nexus i have my near 'perfect' mod list for Synthesis 2.27. So if other gamers are using this version (to avoid the introduced MP issues for SP gamers etc) like i am, you can still get a nice game improvement over the base game.
This first link is to 3 versions of Lo2k's mods that you can only find for the latest versions of the game now. I emailed them and they very nicely provided me a link to get the Synthesis working versions of some of his mods. I put the working parts from that file on my mediafire account for download here:
http://www.mediafire.com/file/ub66yjykhe1ihwa/file That includes: HD Clouds 4k, Clean Ship Space Map 1.0 and Slow Clouds 1.1+True Clouds 1.1
Below is my modlist (These go in the \GAMEDATA\PCBANKS\MODS folder as per usual):
002_NoCameraShake.pak - by Leonid
004_SSOOR[y,3,1000].pak - Starship Out of Range 2.23 by alechielke
005_Space Station Interior Fix 1.1.pak - by Lo2k
006_Sin_WaterTwoZero.pak - by 6th_Sin
007_PROJECT_ATLAS_WATER_COLORS_NO_UGLY_COLORS.pak - by thegamer3006/moddingaccount
008_PROJECT_ATLAS_PLANET_COLORS_NORMAL.pak - by thegamer3006/moddingaccount
009_Black Carbon 2.1.pak - by Lo2k
010_zzzCreatureRange.pak - by Battou
011_MOD.Pamehabia6.LessCreatures.1.5.pak - by Pamehabai6
012_zzzIncreaseDrawDistance_MoreGrass.pak - by Battou
015_No High Clouds 2.0.pak - by Lo2k
016_Slow Clouds 1.1+True Clouds 1.1.pak - by Lo2k
017_HD Clouds 4K 1.0.pak - by Lo2k
019_Black Space + Nebulae.pak - by Lo2k
020_No Space Dust.pak - by Lo2k
025_Astro-FarPlanet.pak - might have got this from the other NMS mod site?
026_Clean Ship Space Map 1.0.pak - by Lo2k
028_ZRatCraft - Flight Modifications.pak - by Ratan Kabidge
GCCAMERAGLOBALS.GLOBAL.pak - this is part of the NoCameraShake mod and goes here in the 'MOD' folder.
The numbers at the front are just my way of forcing load order, you can search for the mod names on the Nexus to get those specific Synthesis 2.27 compatible versions and see what they are about.
I thought i'd put this info here (rather than in the topped mod thread) as they directly relate to the last good Single Player only + never needed connection online version of the game, Synthesis 2.27.
Edit:
I took out 018_MOD.DarkSkiesV1.2.pak - by Weezedog, as this is a really old mod and after lots of comparison shots of with it in the mod list and out, it appears it does not reduce that grainy filter around clouds or on the low horizon when looking up from a planet at night time (most noticable then), as it once did.