Just though I`d register to post a comment, I bought a less than 10k miles old Jabba stage 4 last year for my conversion (16vG60 golf), and from the word go the thing leaked oil past the mainshaft seals into the exhaust/intake. A few weeks (2k miles on my engine) ago it started making a nast intermittent metalic knocking noise so I removed it and had a quick look inside, the apex seals were about 8mm too short!
I sent it off to G-werks and had a std rebuild, luckily I caught it in time, fitted it a few days ago and it sounds a million times better (thanks Darren :thumbleft: ), got the stock pulley on and I`m running it in but I`ve got no concerns over it now, if you get the G rebuilt by a reputable company who actually care about the job you`ll have no problems..
From looking inside the Jabba charger it looked like they used whatever bearings/seals they had to hand :( .