[gumby79]

1)aero template Overlay found at the top under tools .Im working on an android so not as easy but doable
2a) that is pretty good-looking down to about the love handle area ,wight stripe on your lethers, things get too steap from there adding a spacer to fill the Gap behind your hips and continue the transition to the tip of the tale. Think like a fish. (|) not like a whale (--) your+bike are so short you don't realy have room for reattachment vertically.,However horizontal taper ,your setup is small, and you are tapering on 2 plains L&R. 12°per 10%length ea.take it as farback and down as the rules alow..
Tuck. your helmet has a cam built in , the gold wing, to reduce buffeting caused by the uneven separation of a standard helmet. However in the pic its more of a trip edge /spoiler. It needs ~(aproxamitly) 15° rotation clockwise. Based on the brick wall as levle this 15° will reduce frontal area and move the template 6" forward, allowing more room for taper=better CdA

2b) add a tail to your lether with industrial velcrow make follow the 3d template on 3 sides T,L,&R. Botom contorted to matchrear faring. Was thinking semi dense open cell foam.

2c) gap should be interference fit. Ast why I suggested the gap garde be attached to you . And with this attachment it must give in a crash and be brake away to prevent further injury.

3a,b)see 1 and 2a
3c) idk Aerohead or others may chime in.