Drop-in Mod for Airbrush Compression Spring

Chopping / cutting off the airbrush compression spring is one of the AB mods I wanted to try out.
Since I didn't want to chop / cut my stock needle spring, I found out that the springs you find in a Rear Sliding Damper & Brake Set for Tamiya Mini 4wd (15198) are a perfect fit. 
Here they are shown compared to the original spring
When put together, it is two coils less than the original, one too many than I hoped for.
If you are familiar with these springs, the black one is the soft spring, the silver is the hard one. 
Putting my airbrush back together, it wasn't as bad as I expected. I've put the tension setting to maximum. There is a significant reduction in trigger tension, and the best part is, it had a longer trigger pull compared to the original spring. 
If the original spring gave you 1:1 feedback, this one is, I think, in the zone of 3:1 or 2:1. 

Compression Ratio being:
Trigger pull : Needle retraction

Why the certain effect? The black spring has to compress first before it gives a good push to the silver one.
I'm still trying to find a sort of bushing to place in between the springs so I can match the original spring length. 

Lessening the trigger tension can simply be achieved by adjusting accordingly.

Found a suitable bushing from an insulated wire connector. Fits perfectly! 

Polishing Airbrush Nozzle

WARNING: Doing this might damage your nozzle. Polish at your own risk.
This is how I polished the inside of my airbrush nozzle. I was not satisfied with just thinner in removing dried up paint.

What I used:
1. Mini drill
2. Rolled tissue (if you roll it really fine, it would reach the outside of the nozzle)
3. Tamiya polishing compound

Taped the other end of the tissue to fit the drill chuck. Mounted the drill on a table clamp like so:

Using a toothpick,  I applied little amount of polishing compound on the tip of the tissue. Inserted the tissue to the nozzle first using a parts clip before turning on the drill. Never underestimate the power of the turning tissue. It could warp your nozzle. Polish lightly. I couldn't get a decent photo of the inside of the nozzle after polishing, but it was really shiny. 

Managed to get a picture of the polished nozzle.
This is a 0.2mm nozzle
This was taken very close to my desk lamp bulb to get a good glimpse of the shine.