Some of Rainman Ray's techniques leave me wondering. For example, why doesn't he use rags to catch the power steering, brake, or other fluid that everyone **** well knows will drip out when he disconnects that thingy? On a drip-related note, is brake cleaner the answer to everything? I love the sound effect startling the audience with a can of brake cleaner, but his truly excessive use of this stuff is ridiculous... of course it works, use it for what is needed, but using copious amounts for no good reason is just dumb.
Generally his approach is sound and he diagnoses most problems correctly.