I don't know about being an expert , but will try to help you.

(1) Never a marathon but do work , repairs residential , 100 * temps, I switch everyday with G2BG plus tape and get a pretty good hold.
(2) NO ....nothing but all skins, no lace, too much trouble with lace , too many issues !
(3) Get good front with skins, kinda semi-exposed.
(4)V-Loop that I wear , combs like natural hair !
(5) Damp hair after shower , tape for security, down the center of scalp, plus G2BG Spiking Spray , mixed with G2BG Rubber Cement ! Gives me a good hold...I remove and attach everyday.

Hope this helps.

johnny/albuqerque