dragr,
That's a catchy name you got. Does that mean that you do 1/4-mile racing and do 13-second ET's? WOW!
Regarding your soil, if you've only had it for 2 years, personally, I won't change it. Unless, you have some kind of infection, bugs, or something. Changing it might just hurt the roots. Since you have it indoors, where it's warm, just place next to a bright window. Let it bask in the sunshine a bit and let it continue to grow.
If you want to improve the soil condition, the next time you water, you might want to just soak the whole pot in water with 2 drops of Superthrive per gallon of water, and half strength
(**) of your favorite fertilizer, for a whole hour or 2. Place the pot in a container(a small "Muck-Bucket" is great for this) large enough to hold the pot and liquid close to the soil top. Pour the liquid onto the soil slowly until it runs out the bottom and fills up the bucket to the top of the soil. Do not let it soak more than 4 hours. You'll drown the plant.
(** Esp. in this case since you said you've not fertilized the plant at all[for 2 years?], use the half strength recommended by the manufacturer. e.g., Miracle-Gro Soluble All Purpose[28-8-16] recommends 1-tablespoon of fertilizer per gallon of water. So for this time, use only 1/2 tablesp per gallon, because you do not want to shock the plant. Assuming that the plant is where the temperature is over 70F, you'd want to fertilize again in 2 weeks, this time using the full strength. Also, the next time you water the plant, mix 1 drop of Superthrive per gallon of water and do the same when you fertilize.)
For fertilizer, check out my response to a similar question on this thread:
http://www.bananas.org/showthread.php?p=9211#post9211
Hope this helps.
Chong