Again I'd like to thank HELEN, jim100361, barbieq25 and welshblue for helping me to sort out the problem/s with "Finders-Keepers".
With the sun shining today I took my box-end wrench out to the middle of the street, placed it on the painted line. After a few minutes of study, I grabbed some measurements and compared it to my drawing.
Conclusions:
1.) Scale of wrench is larger than painted line (affecting the perspective?).
2.) Shadow effect is too heavy.
3.) Keep working to get it right.
4.) Let the paint dry (metaphorically speaking) before posting online.
@ barbieq - I appreciated your husbands input, please be sure to thank him for me. Again, thanks for lending a hand.
@ welshblue - Your sage advice is worth far more than 2 pence. Many Thanks.