Update:
I just got my Vanos seals done.Seals weren't difficult at all,but the pressing of the sprocket lip was a nightmare.Especially the first one.
The first sprocket was really difficult to insert into the lower press half and all the following complications.If I understand it correctly,all the sprockets meet certain limits,but given that that press is so stiff and the sprocket itself isn't a tin can alike,I had around 3 hours fight.My weapons were a torque wrench,which was completely useless because I met 105 ft. lb. after about a half turn of a bolt and I had about 5mm of thread to go yet.So my main tool was a 39" breaker bar with 1" head and an impact 27mm socket,both things were bought for a Jesus bolt.
So it took me at least 540º of rocking back and forth to get each leap pressed to the plastic with no gap left at all(used to be 0.9mm)
So now I want to mention about the Teflon ring and an O-ring.
The ones that I removed from the Vanos weren't that bad,but the O-ring was squared on the outer rim and Teflon ring was not a rigid as the one that came in Beisan System's kit.I managed not to damage any of those,so will need to return an extra Teflon ring I bought.
Over all experience during the process was good,Beisan's DIY is detailed,but the process is pretty intuitive itself especially when you remove the seals and you get where and how they are positioned inside.
I taped my struggles with that 39" breaker bar.Once my improvised vise base broke and I almost flipped my work bench,at some point I had to counter hold it with my foot at the surface level .Quite a circus I should say
