Hey OTC, thanks for all the help so far. It has been great. One last question regarding the way my double vents were reconstructed. I noticed the end of it was not constructed the same way as all my other double vent suits. The ends have 4 layers of fabric instead of two. Its hard to fully explain. Here are pics, showing the difference.
This first picture shows my suit that has never been shortened. The vent is in its original condition and the end of the vent is met diagonally with the side of the vent.
Warning: Spoiler! (Click to show)
Would it be too much to ask my tailor to refinish the bottom of my vent?
The original angled seam is a cheaper construction. Sometimes the seams are trimmed inside and it is a pain or not possible to recreate it. I don't try to duplicate this as the bottom picture is a better way to finish the sleeve or to turn up the lower edge of the sleeve. He probably folded the vent edge over because of the way the seams were trimmed. One of the advantages of a good tailor working on your clothes is the work he does can be an improvement over the original make.