Star Tracker and modified camera

[laks20]

Hi

I own a Skywatcher SynScan 130P Explorer but I find it does not take good astro images and now I hardly use it  which is really sad and with some money coming in the next few months I want to sell it and buy another good scope to support taking pics of the night sky. 

Well, my question and I need  advice : Since I am really enjoying photographing the night sky at the moment, I am using my Canon 70 D on a good tripod with Samyung 14mm or Tokina 11- 14mm. I have got some ok pics from this of the Milky Way but I am not greatly  satisfied with the results much. As an upgrade, I am keen on buying a star tracker  and a astro modified camera( or something similar to this ). (I want to kick myself as I sold my Canon 450D two years ago for £100) Do you think I should ?  Is this useful ? Can I use the Star tracker with my canon 70D? Also, If I get the star tracker will a astro modified camera help me take better pics. I have seen some stuff on You tube , but I am confused. Also , If I buy another scope will I be able to use the modified camera with that ?

Sorry for asking so many questions.