About to start my first build- a 2.5-inch micro meeting MultiGp Micro Class Spec's.
Below is a video of how I went about choosing each of the components to include the options i was looking at.  It includes the parameters for each component I think are important, options for each component, components specifications compared side-by-side with each other and my choice for each component.  This stuff may help out others fairly new to builds also. 
 
I would appreciate any/all thoughts on the component choices, especially since this is my first build.  Please let me know if you think I'm on the right track or not and if you have any better ideas on how to improve this build over time.  I'm not entirely convinced I chose the right motor/prop combination, however, this may be due to the fact I'd like to run it on 3S as well as 2S.  That might preclude me from using higher kv motors which may be more competitive on 2S only. Please let me know what you think.  There is a time-indexed hyper-linked Table of Contents in the video's description you can click on and go to whatever section of the video you want.  Thanks for your time! Very much appreciated.  

Cool tutorial video

I have truly enjoyed flying my 130mm framed craft for the past 10 months. It fits 2.5" props and it is one of the funnest when finding itty bitty little things to fly around

I did go with 1105-7500kv motors and fly 3S almost exclusively, though with the higher kv...2S work fine for cruising. Maybe something to consider, on 2S the 6000kv motors might be a little light.

I have found the HQProp DP 2.5x3.5x3's to be some of the smoothest and like them better than the GemFan's with my setup.

I went with the HGLRC F428-TX20 stack, but once the VTX finally burned out I shifted to the Eachine VTX-03 and finally landed on Oscar's AKK Backpack with divorced mounting. When I first started flying it, there was noise...but a simple capacitor installed to care of it.

http://intofpv.com/t-the-kt-bug-125mm

There is a link to my thread, though I need to do a little updating. Cannot wait to see what you come up with in your build!

Thank you for your comment and input, I truly appreciate it (and your link also!). I find it interesting you're able to fly 3S on those motors. i thought at that kv on 3S they would come down too hot. This is exactly why I was hoping for inputs like yours. Thank you again. I have already purchased the 1106 6000 kv. They should work out ok for 3S, but I think you're going to be proven right--on 2S, I'm gonna need to go higher kv. Think I may have to try out those HQ props you suggested--I've never flown those before. Heck, I'll try anything at this point--just want to keep learning and improving! Your set-up looks cool!