That looks great, and I like that its 400 tris less than the other, but 800 i feel is still a little on the high side for an object that going to be so small. Definitely not a bad piece, but i would look at something more in the 400 range, kick those cylinders down to 12-18 segments instead of what you got and you could half the tris, a little bit of texturing goes a long way... I may be able to help you a little bit with a few textures, but i can't guarantee you a lot of time, as with my own mods, sometimes there really isnt enough time in the day. Keep workin at it though, there can never be enough stuff for KSP!!! and I do have to say an EVA kit would be a great addition to the game. Almost feels worthy enough of a special career node:) Come to think of it, I use 3ds max now(loveit), but in sketchup, i didnt even know how to make low poly objects. Mostly because you add 3 objects, start movin stuff, all the sudden, wow 1000 tris in 2 mins? I would say I could throw a couple models your way, but nobody gets my model time again, search the forums around for Unity related info and start reading, once you get it and file architecture its really a cakewalk, but its also the standard for getting things to work right in KSP. heres a couple informative links any1 that wants to model should watch:
This is heavily on modeling in 3ds max, but less than 3/4s thru it, he hops into unity, and if you follow it to a T, your part will be in KSP, textures and all. I don't know about EVA stuff so i couldnt point you any further. http://wiki.kerbalspaceprogram.com/wiki/Tutorials The WIKI. Self Explanatory, while being a lil out-dated... Might have to add a few things so I dont forget...