Here is a sneak-peak with download of my part pack. Pretty much my goal with this part pack is to fill in the gaps that stock parts leave. Examples would be make an excessively powerful lifter engine & a slightly more vacuum efficient than stock engine for each tier, add in some utility/quality of life parts (Longer ladders, fuel tanks adapter parts), and some futuristic propulsion.

DISCLAIMER: Parts are a work in progress, many parts have yet to be made, and existing parts might be imbalanced for either cost/use. Please leave me feedback if you have any ideas for new parts or balancing! Or anything really!

Part Classification in this Pack

S Series Engine stands for Smart Series. This engine type prioritizes Vacuum ISP over Thrust. Suggested use is for upper stage for orbital insertion or for anything out in the depths of space.
J Series Engine stands for Jump Series. This engine type prioritizes Thrust over ISP. These engines should have lower ISP than any stock engine, but much higher thrust to compensate. Suggested use: First stage in heavy lifter platforms.
Future Tech: VT1 and QVT. These pieces are not meant to be realistic in terms of thrust. They are meant to provide alternatives to conventional chemical rockets for your late game exploration of deep space while not being quite as frustrating as stock Ion engines (low thrust) or KSP Interstellar parts(Complicated with alternative resource system). I tried to balance these pieces against each other and against the O.H. RTG.

In depth part info in spoiler section.

.625 Engine: Tech Node: Specialized Construction

J Series
38 Thrust
ISP 280-330
.
S Series
10 Thrust
ISP 150-400

1.25m Engines:

Tech Node: Advanced Rocketry
.
S Series
100 thrust
ISP 120-435
.
J series
530 thrust
ISP 240-320

2.5m Engines

Tech Node: Heavier Rocketry
.
S Series
300 thrust
ISP 120-435
.
J Series
2120 Thrust
ISP 240-320

3.75m Engines

Tech Node: Very Heavy Rocketry
.
S Series
700 Thrust
ISP 120-435
.
J Series
4770 Thrust
ISP 240-320

Future Tech

VT1
Tech Node: Advanced Motors
250 Thrust
ISP 5000 (Runs only in Vacuum)
Aprox cost to run at full throttle ~1k ec/s & 51 Xenon/s
.
QVT
Tech Node: Advanced Science Tech
100 Thrust
ISP (might as well be infinite)
Aprox cost to run at full throttle ~2k ec/s & .0000000000000000000000000000000000000000000000000 0000000000001 mono propellant (Looking for a fix for the need for 2 propellants)
Example with a cockpit, the OH RTG & QVT Kerbal engineer was listing over 990 million (yes that is correct) dV for 7.5 mono prop. Essentially have at least 1 mono prop and your golden

Utility Pieces

LumiLeg
Tech Node: Advanced Landing
.
O.H. RTG
Tech Node: Specialized Electronics
Weight: 22.2 tonnes
Electrical Output: 2k ec/s
.
Xenon Tank
Tech Node: Ion Propulsion
Capacity: 90k Xenon Gas
.
Omni Spotlight
5 lights at 45 degree angles from each other
.2ec/s

Structural

.625m Radial Stack Decoupler
1.25m Radial Stack Decoupler
2.5m Radial Stack Decoupler
All attach like normal radial Decouplers, but comes with a 2 stack attachment points. They also decouple.

Fuel Tanks

1.25m to .625m Fuel Tank Adapter
115.2 Fuel & 176 Oxidizer
.
2.5m to 1.25m Fuel Tank Adapter
576 Fuel & 704 Oxidizer
.
3.75m to 2.5m Fuel Tank Adapter
864 Fuel & 1056 Oxidizer

Forum Link Check here for most recent updates: Derp Shield Corp Dev Forum

Imgur Album: http://imgur.com/a/38nta#0

Install Instructions:
Make sure you delete the smokescreen folder (or use the most up to date version), and the Derp Shield folder prior to installing the latest versions to avoid problems. Also make sure you only have 1 copy of module manager, with the most up to date one being preferred.

Other Necessary bits/disclaimers:
This pack includes Smokescreen Version 2.4.1 for exhaust effects & ModuleManager version 2.2.1
http://forum.kerbalspaceprogram.com/...gin-(August-2)
http://forum.kerbalspaceprogram.com/...-6-%28Jan-6%29

Licensing for this Pack: For the time being I'm going to go with "All rights reserved for the contents of the DerpShield Folder". Module manager and Smokescreen have their own respective licensing.
Reason for my decision: Not sure what types of licensing there is, or if I have to do anything special for them and this was the "easy" option in the licensing tutorial.

Changelog:

Version .02 Released 8/24/14
...Includes New Engine: S-Half
...Includes New Fuel tanks: 1.25 to .625, 2.5 to 1.25 & 3.75 to 2.5m Adapter Tanks
...Includes New Omni Spotlight
...Includes Radial stack Decouplers sizes .625, 1.25, 2.5m
...Slight Texture change to the VT1 (Replaced name with Hazard tape.) . . .
Version .01 Released 8/21/14
... Includes New engines: S1, S3, S7, QVT, J Half,
... Slight Balancing Changes to the J series of engines (no longer have more thrust than they should. For example the J9 had 30 thrust higher than it was supposed to)
...A few tech node changes Spreading all the pieces to sections of the tech tree they should be in. Example: RTG is in advanced Electronics now . . .
Version 0 Released: 8/14/2014

Derp Shield Corp: Bigger, Hotter, Simpler