I have a gen2 sprintex kit with an installed 60mm pulley. On my tpr2 head , huge intake and exhaust setup and ns1 cam it made 19psi on summer days even. It DOES use oil when running the 60mm pulley and vented fill plug. As it is I just add a few ml of oil every 2-3k miles. I planned on a rebuild but was told that's just the nature of the beast. It used far FAR less oil when running a larger pulley.  I have a 65mm pulley I can include. It also has NO BELT slip as I'm including the SUPER RARE gpr billet tensioner as well as a 2x brand new belts.
I've had no issues with this sc and it's current setup. If you keep an eye on oil level your fine.
it is being sold AS IS. i cant guarantee the internal seals are 100% but i can guarantee it gave me no issues other than whst id said. Jonbond can rebuild these too for a very reasonable price if you wish to go that route and be safe.. only reason I'm selling is I've moved to a tvs900 and that dented my pockets pretty hard.
i attached a video showing it ripping on my car, listen to this baby SCREAM ! if your looking to take your car to the next level , this is it.
i have numerousparts for sale so i will offer package deals. 
1000$ + shipping for the entire setup , waterpump , bolts ect ( 1000$ DEAL ONLY GOOD THROUGH BLACK FRIDAY )
. I WILL TRADE for a assembled big valve head , brembo front and rear setup or just fronts and 500$ , coolerworx or cae shifter and 500$ , aftermarket ecu , catcam 469 or other brand similar spec and 800$ , 4x oem gp rims or aftermarket lightweight 17x8 , vented carbonfiber hood , carbonfiber hatch , racing seats with sliders , gp intercooler,  or a wmw liquid cooled aluminum intake manifold.
pm or respond to this post.  
Stay safe N MOD on  !