SRB thrust plume not scaling with nozzle size

[BloodyRain2k]

While it doesn't seem to make a huge difference with upscaling the nozzle, it looks veeery weird when you downscale the nozzle and still get the same huge thrust plume.

Here's a 10kN nozzle with what appears to be the default 2.5m plume.

http://imgur.com/DooEvdi.png

[jrodrigv]

This is quite important for me too. Specially when building small things like missiles.

[Schnobs]

On a related note, I like to use procSRBs for hand-tailored separation and ullage motors. The sheer amount of flame from these tiny things is disturbing.