I am for the lack of better description; scared. I spent all of 10 minutes poking around under the hood of my donor car spraying PB Blaster on the fittings to the proportioning valve. When I finished, I felt my back had done enough and I stopped to take a minute before suiting up for work. That was 2 days ago and I still have lower back pain keeping me from doing anything ! I am not that old by any stretch (36). since my late 20's I noticed bending over a fender for a day would be hard on my back making it kinda stiff, but now it is a real problem. Im afraid one of these days Im gonna be working under the hood and I wont be able to straighten myself back up until help arrives. If this keeps up I will see a Dr. but I doubt they will have anything for me but a large insurance deductable. Im concerned. I just really got down and dirty with this project and I dont want to stop now. This is something I have wanted to do all my life, just watching from the sidelines, reading about, and observing others. What's worse; if I go to work with a sore stiff back I run the risk of getting into a situation I won't be able to maybe handle, putting myself and my partners in jeopardy. At a moments notice I may need to tustle with guys twice my size with a lot more to lose. Just last night we had shots fired and a car chase which landed us one suspect caught after a lengthy foot chase and one on the loose !! I cant go into that sh** with a sore back. Whatever advice you all have I'm up for. Thanks.