Sorry Mike,can't agree with you on this!There was such an issue with SP4 fork seals leaking that it ended in a court.I think you will find that most people that have or have had SP4's with Ohlins have had a problem.
As for the Forks on the SP5,they are completely different to "Standard" 888/SP0 forks.the SP5 was the only 888 that came with the Showa GD 061 forks,as opposed to the GD 011's fitted to the rest of the range.
This is only my opion of course,and am prepared to be proved wrong!