4th gen ECG cooler replacement

Hello! I have coolant leaking inside my ECG cooler and was quoted $1500 to have it replaced parts and labor. I want to do it myself, but am looking for a tutorial on removal of the unit. I haven't been able to find much info in form of video tutorials on the subject. From what I've gathered from cleaning threads and forums it's possible, but will take time getting it out and in. To save a grand I'll take the time though. Any advice would be greatly appreciated! Thank you!