Hello again my fellow Kerbalnauts! Okay, so during my three day weekend which I rarely ever get anymore (Woohoo!!!), I had some spare time available for me to setup a testing environment for KSP to see which mods I use play nice with the ISA MapSat 4.0 Dev Build and which ones seem to bog things down. Below posted are the results of my findings. First, let me list which mods I specifically have at this time: ISA MapSat 4.0 Dev Build (of course! ) NovaPunch v. 2.02 - Updated for 0.21.1 B9 Aerospace Pack R3.3 KSPX Parts Expansion Kosmos Space Station Parts Pack Kerbal Engineer Redux v0.6.1.1 Chatterer v0.5 To commence the best testing environment possible, what I would do is I would load each mod individually of each other and check memory usage to see which mods would have the most impact when used in conjunction with ISA MapSat. Let me just clarify that while watching my Task Manager, ISA MapSat always skyrockets my physical memory usage to about 38% - 40% capacity, in my case this is around the neighborhood of 3,000,000 K (around 5.0 GBs give or take. I will usually experience crashing situations when my memory hits about 3,900,000 K or beyond (around 5.5 GBs). So with that being said, let me post how the above listed mods impacted my playing experience while using MapSat with KSP! KSP (vanilla) no mods\extensions - Memory usage would be in the neighborhood of about 1,700,000 K. Extremely stable and no CTDs to report. KSP w\ KSPX Parts Expansion - Memory usage hardly changed, would be in the neighborhood of about 1,800,000 K, extremely stable and no CTDs to report. KSP w\ KSPX Parts Expansion and NovaPunch 2.02 - Memory usage signifigantly increased with addition of NP to KSP, shot memory usage to the neighborhood of around 2,100,000 K, sometimes fluctuating to 2,200,000 K in some cases. Still very stable, no CTDs to report. KSP w\ KSPX Parts Expansion, NovaPunch 2.02, and B9 Aerospace Pack - Memory usage signifigantly spiked with the addition of B9, right around the neighborhood of around 2,700,000 K. There was on instance of a CTD during my transition from VAB to Space Port, but no others the hour after that. KSP w\ KSPX, NovaPunch 2.02, B9 Aerospace, and Kosmos Space Station Parts Pack - This increased memory usage to the neighborhood of 2,900,000 K. CTDs were more prevalent after the addition of Kosmos, roughly once every 10 - 15 minutes. KSP w\ KSPX, NovaPunch 2.02, B9 Aerospace, Kosmos, and Kerbal Engineer Redux v0.6.1.1 - No major increase in memory usage. Still around 2,900,000 K of memory in use. CTDs still happening due to the addition of the other mods. No reason to believe this mod causes crashes itself. Will test individually upon request. KSP w\ KSPX, NovaPunch 2.02, B9 Aerospace, Kosmos, Kerbal Engineer, and Chatterer v0.5 - No major increase in memory usage. Still around 2,900,000 K of memory in use according to Task Manager. CTDs still happening due to addition of the other mods. No reason to believe this mod causes crashes. Will test individually upon request. KSP w\ KSPX, NovaPunch 2.02, B9 Aerospace, Kosmos, Kerbal Engineer, Chatterer v0.5, and ISA MapSat 4.0 Dev Build - Immediate crash to desktop upon launching craft equipped with ISA GPS and ISA Dish. Memory spikes to around 3,900,000 K, sometimes surpassing 4,000,000 K (approx 5.50 - 5.75 GBs of RAM). What I am using now, and have not had ANY CTDs at this time since I've started: KSPX Expansion Parts NovaPunch 2.02 Kerbal Engineer Redux v.0.6.1.1 Chatterer v0.5 ISA MapSat 4.0 Dev Build The above combination has my phyiscal memory usage at approx 3,300,000 K. To test, I left a MapSat running last night when I went to my girlfriends house and when I returned this morning 6 hours later, it was still running perfectly. Also, please note I updated the map resolution in the Kerbalpedia section to 720 from 200. I navigated around the game very comfortably also with no CTDS (navigated from VAB to Space Port, SpacePort to Tracking Station, ect.). So in summary, I removed B9 and Kosmos and the removal of these two seems to have freed up a lot of system resources to be used with KSP. Just wanted to share with everyone. Please feel free to shoot any questions my direction!