My dremel 300 is barely alive after 15 years of metal polishing, drilling, cutting bolts, trimming siding installs with who knows how many hours. The power cable is so chemically destroyed from metal polishing that it crumbling. The rubber casing is almost completely dissolved off. The speed controller works intermittently. The bearings are so worn that it gets too hot to hold after 30 mins of straight usage. Repairing it is not cost effective.It was time to upgrade!I purchased a Dremel 4300 to replace it. It just too big to hold for long periods. Purchased the flex cable. Mounted it and the cable vibrates way too much. Then I didn't like that the speed control and power switch were too far away. I purchased a footswitch... That didn't work. Turned up the speed control to 100% then the pedal cuts in and out. Can't use it on an speed controlled dremel. Can't use a foot switch on any electric motors with centrifugal switches either. Now it was over $200 into this setup and wasn't happy. Returned all of it.Searching and reading and comparing reviews for hours and hours lead me here to this unit. It was very close to the getting Dremel Fortiflex at $250. The harbor freight unit was out with way too many negative reviews. That was $50 too. It's a lot of work to try and determine the general unhappy whiners from real reviews with real problems.I picked this unit up after reading the reviews and taking the chance. I'm sure everyone has been there. The unit came in a generic foam packaging. It was setup quickly hanging up. Read the manual with adjusting the sheath at 3/4" and making sure it not being used in a tight angle. The sheath needed to be adjusted as it was sticking out at 1 1/4". I spinned it at slow speeds with a few burst speeds for 5 mins. No issues.The only problem so far is the chuck. The jaws get jammed during opening and closing at certain spots. Prepare for some back and forth with the wrench if the jaws get jammed. Remove the handpiece for this working of
Grits 
