Yep sorry for the confusion. And the 3.8's will work fine in that situation, the only ones I wouldn't put in the 4007 is the 5.8's. A little to bulky and long, lots of twisted tails.
I use a screw lock 5/0 EWG made by VMC for mine and have no issues with durability. Also Mend-It is a great product to try. Fix up the baits you used that day when you get home and there as good as new for the next time around. No doubt the Super Flukes are great baits, but the Keitech's and Super fluke both have there time and place for when to be fished. Some people can justify the price on some baits, but for others its just not worth it.