Chainer

I'd say a RAM increase would help, double up to 8 GB and you should see a noticeable improvement, it's also the easiest change to make.

Awesome videos man, I actually registered just to say how awesome they are. I've been struggling to circularize my orbit and make it out to the Mun for the last few days, but just today I have managed 2 horrible attempts at landing on the Mun! But hey, I can get a nearly circular orbit reliably around both Kerbin and the Mun. I've got to say that the way you break things down really helps me get the basics of it sorted. The one thing I have problems with is building a reliable lander and getting it to land. If you could find it in your heart to help out that would be amazing. Would love to get on the TS server but most of my playtime is while I am at work. Anyways, keep up the great work and I look forward to more!