Andy...if you open the homepage [ I assume you already have before now] and click on the blue triangle down bottom-right where it say`s `` order now, stock units`` , you`ll see the specs. available in stock.... yes, you can thin any [lace] system easily before you apply knot-sealer ...best way to do it is with a hair-removal cream dabbed onto the knots .... proceed slowly....here`s a link which is informative: http://www.youtube.com/watch?v=rPULkcyVD2Y
In relation to the colour....browns and blondes can be trickier due to there being so many hues..the match is usually better/best with a custom-made system because of the hair sample submitted with the order, but it can still be `off` sometimes.
Your best bet is to try to get the system as near as possible to your growing hair colour [ obviously] or next best bet / idea is to have the system a shade darker and simply colour your growing hair to match...it`s usually simpler to colour your growing hair than start `messing`about with a system as a newbie and the risk on top of it, of staining your lace base. The system hair will `lighten` from oxidation over time and the `added`colour on your growing hair will lighten too from repeated washings and oxidation too..... if you go the other way [assuming you actually may not get an exact match] and order a system that`s very light compared to your growing hair, it can be more problematic to use colouring products on a new system....you have enough things to get used to as a new wearer without getting involved with colours on day one.... even if you are `wary`of colouring your growing hair, you can easily get a stylist to bring it down a `step`[darker] for you and nothing extraordinary about that.. i.e. there`d be no `raised eyebrows` ..you don`t have to tell them you intend wearing or anything like that...just simply that you want your hair to look just a LITTLE deeper/darker. Just a few suggestions. Cheers.