I agree Hook, I also have a few knots I rely on. I use the nail-less nail knot most of the time to attach a leader, as I use my clear line which is a solid core, and I can tie it as quickly as I can attach an unknotted tapered leader via loop to loop. For my floating line I will tie an albright to attach the leader at home (I use 5 or 6 wraps), but I use a 12 pound mono and it seems fine to which I tie on an 8 pound tippet (I'll go down to 5 lb in low clear water) using a bloodknot or double surgeons. I use a trilene on the hook, but will have to try the non slip mono loop to see if it creates more action translating into more fish. If I have to switch the leader (due to abrasion) I will use the nail-less nailknot and just check it frequently for cracks in the housing. Have luckily not had it fail on a fish, although I have pulled it off before while tightening the knot on a worn end of the line. The loops in my sinking tips are attached to the running line currently by way of a homemade loop wrapped in thread as you described earlier, but I have used a braided loop in the past, and as I said have not had it fail, but I have not fought a spring on it either.