I've been wearing full caps for 2-3 years, and I think some key points are making sure the original measurements or template are very accurate. I really suggest making a saran wrap template for best accuracy. I wish I had done that originally. It would have saved vast amounts of time tweaking subsequent orders, alot of cutting/trimming into shape. I used the sheets of paper from the order page for head measurements which are not accurate for curves etc. Also, it is imperative to get the sideburns absolutely correct. Fit around the ears is very tedious to trim but absolutely necessary...or you'll be busted. The snugger the fit the better, but it creates the problem of a more difficult attachment to the head especially with glues such as ultra hold or tite grip. They really catch to the scalp when trying to place the unit on the head even with coating head with alcohol. And once those glues catch skin, they are extremely difficult to readjust on the head...and a real mess can ensue catching hair, fingers etc. Thinskin perimeter works great UNLESS you have a GF who likes to run fingers thru hair or grab your neck nape. The ridge from the thinskin can be detected. I am presently ordering one with no thinskin and will use it on date nights, and other unit used for work/play etc. I am not looking forward to cleaning the lace as thinksin is a piece of cake for cleanup.