* This is NOT a fast DIY = one day or less.
* This is NOT an easy DIY = it requires special tools, muscle, technical skill + math.
* This is NOT a cheap DIY = parts, tools and your time learning the skill.
The difficulty rating on this is 9.5 of 10.
This is one of the MOST rewarding do it yourself jobs =
* Typically 1/3 the cost of a short block.
* You never have any doubt about what was done or how it was done.
* The satisfaction of doing it yourself..
* The knowledge that you have a valuable new skill.