I have to chime in here and mention that just because you do a conversion kit that changes the slave to external doesn't mean you will never have to pull the trans again, There will always be the very small chance this could happen with either set-up. Much like our HD Hydraulic Bearing a delete kit still has a Release Bearing inside the bell housing.
The problem with the spec clutches that we have seen are that the set-up heights are all over the place, When the clutch sets up too high it bottoms out the slave bearing which in turn overheats the release bearing making it burn up, Much like if you were to partially push the clutch or ride the brakes the entire time you are driving the car it can over heat them, This will cook any throw out bearing to death. If you cook the bearing it will eventually cook the grease in it and make noise or lock up, On a CSC when it locks up it takes the seal with it, Either way with a CSC or Regular release bearing you are pulling the trans to repair. The good part of this is it is not an issue with a properly set-up clutch.
This is a wear item just like any other release bearing, When the clutch is worn out or trans is pulled it should be replaced, We offer our bolt in rebuild kit at a greatly reduced cost to the new unit, So once you buy the first kit if you ever have to change the clutch again (again, not likely you will have to unless you are really hard on clutches) you can contact use for a rebuild at a much lower cost than the entire kit.
Our HD CSC has been a trooper, We have it in track cars, Drift cars, World Challenge Race Cars and many many street cars 4 years and counting.
We would also like to mention that Southbend clutch now includes our HD CSC with all their 350Z/G35 HR and 370Z/G37 VHR clutch kits starting Feb 1st
With any product, esp one as popular and as public as our HD CSC has been of course you are going to see a few failures, and with forums in the mix, you are most likely going to hear about every one of them. There is no reason to be scared of a CSC, They are used in almost all race cars and in probably 95% of all newer production cars, Unfortunately Nissans OEM CSC is plastic and sucks
We spent a good amount of money and time 2-3 years ago designing a release system using mostly factory parts and a properly designed front cover to work correctly with the HR/VHR transmission input shaft bearing size. We just liked the CSC better at that point for cost, ease of installation and operation or we would have gone into production on it. This doesn't mean there won't ever be a external release system from us though....
On a positive note
Our HD CSC unit weighs in at 1.5lbs.
Lower cost comparatively.
Does not increase pedal effort or make the release point higher than stock.
Bolts easily in factory location
Very Universal, Works with just about any clutch
Self adjusting, Never needs adjustment
One moving part
Any issues with our HD CSC from the very early units were addressed and modified to make this one of the best options out there.
We 100% stand behind our products and will always be available to help with your questions any way we can.