Hey just to throw in my two sense. this is a method used mainly by african americans and The method you are going with is not as common on this website and most people here are going to tell you they must loosen to knot up and so forth, which is true... However when starting locks with the comb twist and finger coil method usually people tend to take a different route and indeed do try to "protect their dreads" This is a main difference in maintaining dreads started with twists and dreads started by all the other methods. I will not tell you that you should retwist them regurlarly which id be willing to bet someone has told you to do. While you can and they do promote a neater look when twisted, it can cause balding if over done. If it were me i would personally never retwist them and let them form organically which most people on this site will tell you the same thing. However know it is not the only way and lots of people with twists opt to wear a du-rag, or stocking cap to bed and decide to wash their hair less frequently to keep their twists in tact easier. if yours come out all the way i would just say just twist them right back up. Ultimately rather or not you want to continue twisting as a form of maintenance or take a more natural route is up to you. It largely depends on a matter of personal preference of what you want your dreads to look like. most people with twists anticipate neat dreads. If this is what you anticipate do not expect that from following the advice of jsut letting them be. Yes you will get beautiful dreads by letting them be, but in the process they will certainly not look neat by what most people with twists describe as neat. I just thought you may want to hear from someone who has close to your hairtype and has done alot of research on twists. Mine myself are not twists they were twist and rip to neglect method.
dreads are awesome pretty much either way. I say let those babies go and free form them only seperating when needed. But know that is not the only option you have.
-Spencer
btw (check out my baby locks.)