you should definitely wash it to remove silicone, just using alcohol on the base wont do it. use something like dawn dish washing liquid.
as far as the temple flaps if you pull your template further back so you can include the flaps you will loose the front graduation. the graduation softens and makes the hairline look natural. not only that but generally all the knots arent bleached to make them completely invisible, it is usually done on only the front with stock systems. i am not positive if this is the case with toplace units. you should ask john about that. additionally you will then have short little nubs of hair that will destroy the hairline and would need to be plucked. not only that but the hairline is usually done with single hairs and the rest of the unit isnt...i guess none this matters if you dont intend to expose the hairline at all....personally i would not feel comfortable even with a hidden hairline that is full of visible knots and nubs.

being that you didnt upload pics of your situation i can not comment on whether or not you definitely need the temple flaps. but from what i gather they would be quite small so i assume that their need is negligible.

then on the other hand maybe they are needed to compensate for receded sides that would cause the piece to look off without creative styling....here are some links to other posts that i hope clears up what i am saying. i had done some rough mock ups for these individuals

http://forum.toplace.com/showthread.php?...2#pid43962

http://forum.toplace.com/showthread.php?...5#pid43745

this guy did a fantastic job!now imagine if he went with a stock! it would look quite weird.

http://forum.toplace.com/showthread.php?...8#pid44068

personally i do order stocks (obligatory disclaimer.....not from here) and what i do is i cut the hairline to an A contour, re bleach any knots, pluck where needed and use nair to recreate the graduation. that really isnt something i advise you to try with your first hair piece though!