Right off the bat im loving the adjustable draw. Another positive is its not quite as big as it looks in all the pics. Its currently blowin like a freight train with a LR atty and Boba's Bounty. I couldnt be more happy. Thank you Imeo!
I don't use the fuse protector kit. The stock spring does not act as a fuse. I believe it is used to be a softer contact on the negative post.
Welcome Vaporologist - I use the fuse upgrade in all three of my GGTS, 2 springs go in it. Added protection and much better feel for battery contact w/upper post. I feel they are necessary. Thats my opinion though. O rings should last a long time if lubricated, follow Imeo's video and you will have no problems.