Hi sidebender.... sorry to read you had such a sudden on-rush of hairloss.....that must be really scary / freaky to experience....it`s bad enough when it`s gradual !
Be aware that stock systems are a ` middle-of-the-road` solution, usually, especially in terms of fit ..we all have variations in head-shape etc. and the best way to get a system to fit your particular head is by making a template and getting a custom-made system, when you have time. That is probably the reason you say the back is sticking out ...a stock system normally will not fit as snugly as a custom-made one. The density is ` standard` too and that may not always suit everybody, for obvious reasons.
It sounds like your head was not shaved to ` accommodate` the system ? You say there is hair underneath and it`s preventing you getting a closer bond .. I`m not sure why she is saying to leave it grow out ..maybe she means to allow your side and back hair to grow a bit longer to ` match` the [relatively ] longer system hair but there is no need to allow hair directly under the system to grow...it`s best to just shave your head to get a better hold ...
Some guys get a long-term hold with that tape..for me it only lasts 3 days before breaking down...just depends on your individual body-physiology.... have you got a supply of de-bonding products ? You`ll need `lace-release` to gently remove your system, and some glue / tape ` melters` to remove residues from the scalp...
You could carry a tube of ` got2beglued` spiking glue [ it`s in a yellow container /tube --you can get it almost anyplace] ---lots of guys use that / keep it handy for ` emergencies` --it`s SO easy to use and it`s water-soluble so just hopping into the shower and allowing water to get at it will debond it ...it easily rinses off of the lace too without too much fuss..
Brylcreem original can be used if you want ...however, use it sparingly ... a teaspoon-size amount in the palm of one hand, ..wet the other hand with water and rub both together....try to get most of it onto the fingers, then open the fingers and ` plunge` them into the [damp] hair ...this adds a bit of shine / lustre..however, such products can and do build up and leave the hair looking lifeless [which defeats the original purpose] and need to be shampooed out ...over-shampooing will lift [lighten] the colour and dry out the hair ...so go easy with ` products` .....a good leave-in /daily conditioner misted onto damp hair is usually all I do .....
There`s a steep learning -curve with wearing ..you can see now what type of transformation is possible, for a relatively low cost....however, don`t expect miracles from day 1 --- you can refine your desires in terms of subsequent orders on such things as colour / density, style, and size of system....stocks are fine, but they have their limitations too...welcome to the world of wearing !