i just bought the valve adjusting wrenches from him a few weeks ago, and was fairly impressed....although i thought the cost was more than i should pay for 2 wrenches and the shipping wasnt exactly lightning fast, the instructions are pretty detailed...

what you could do is get whatever parts you need from a cheaper source and if you need instructions try instructions are actually on video as opposed to just some directions printed out on paper...much much easier to understand, for me anyway

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1985 300SD 192,000miles...Astral silver/ Grey MbTex

1983 300D 194,000miles...White/Tan MbTex...my newest addiction